diff --git a/experimental/babel-preset-env/.eslintignore b/experimental/babel-preset-env/.eslintignore
index 3321ba5dea..87bef84070 100644
--- a/experimental/babel-preset-env/.eslintignore
+++ b/experimental/babel-preset-env/.eslintignore
@@ -1,2 +1,3 @@
 /lib
 fixtures
+/data
diff --git a/experimental/babel-preset-env/.eslintrc b/experimental/babel-preset-env/.eslintrc
index ee6cdeb8e7..df0bcbfb7d 100644
--- a/experimental/babel-preset-env/.eslintrc
+++ b/experimental/babel-preset-env/.eslintrc
@@ -3,5 +3,14 @@
   "parserOptions": {
     "ecmaVersion": 7,
     "sourceType": "module"
+  },
+  "rules": {
+    "arrow-parens": "off",
+    "indent": "off",
+    "comma-dangle": ["error", "always-multiline"],
+    "curly": ["error", "multi-line"],
+    "func-call-spacing": "error",
+    "key-spacing": "error",
+    "no-multi-spaces": "error"
   }
 }
diff --git a/experimental/babel-preset-env/package.json b/experimental/babel-preset-env/package.json
index dcef414b00..843d082f09 100644
--- a/experimental/babel-preset-env/package.json
+++ b/experimental/babel-preset-env/package.json
@@ -16,9 +16,12 @@
     "dev": "babel -w src -d lib",
     "fix": "eslint . --fix",
     "lint": "eslint .",
+    "precommit": "lint-staged",
+    "prettify": "prettier --trailing-comma all --write \"src/*.js\" \"scripts/*.js\" \"test/*.js\"",
     "test": "npm run build && npm run test-only",
     "test-ci": "nyc npm run test",
     "test-only": "mocha ./test --compilers js:babel-register -t 10000"
+    
   },
   "dependencies": {
     "babel-plugin-check-es2015-constants": "7.0.0-alpha.1",
@@ -68,9 +71,12 @@
     "eslint-config-babel": "^6.0.0",
     "eslint-plugin-flowtype": "^2.29.1",
     "fs-extra": "^2.0.0",
+    "husky": "^0.13.2",
+    "lint-staged": "^3.3.1",
     "lodash": "^4.17.4",
     "mocha": "^3.2.0",
     "nyc": "^10.1.2",
+    "prettier": "^0.22.0",
     "rimraf": "^2.6.1"
   },
   "babel": {
@@ -98,5 +104,15 @@
     "include": ["src/*.js"],
     "instrument": false,
     "sourceMap": false
+  },
+  "lint-staged": {
+    "{src,scripts}/**/*.js": [
+      "prettier --trailing-comma all --write",
+      "git add"
+    ],
+    "test/*.js": [
+      "prettier --trailing-comma all --write",
+      "git add"
+    ]
   }
 }
diff --git a/experimental/babel-preset-env/scripts/build-data.js b/experimental/babel-preset-env/scripts/build-data.js
index fd16232fd0..0de81f2d8e 100644
--- a/experimental/babel-preset-env/scripts/build-data.js
+++ b/experimental/babel-preset-env/scripts/build-data.js
@@ -10,7 +10,7 @@ const pluginFeatures = require("../data/plugin-features");
 const builtInFeatures = require("../data/built-in-features");
 
 const renameTests = (tests, getName) =>
-  tests.map((test) => Object.assign({}, test, { name: getName(test.name) }));
+  tests.map(test => Object.assign({}, test, { name: getName(test.name) }));
 
 const es6Data = require("compat-table/data-es6");
 const es6PlusData = require("compat-table/data-es2016plus");
@@ -26,7 +26,7 @@ const environments = [
   "ie",
   "android",
   "ios",
-  "phantom"
+  "phantom",
 ];
 
 const envMap = {
@@ -51,101 +51,106 @@ const envMap = {
   ios51: "ios5.1",
 };
 
-const invertedEqualsEnv = Object.keys(envs)
-  .filter((b) => envs[b].equals)
-  .reduce((a, b) => {
-    const checkEnv = envMap[envs[b].equals] || envs[b].equals;
-    environments.some((env) => {
-      // go through all environment names to find the the current one
-      // and try to get the version as integer
-      const version = parseFloat(checkEnv.replace(env, ""));
-      if (!isNaN(version)) {
-        Object.keys(envs).forEach((equals) => {
-          equals = envMap[equals] || equals;
-          // Go through all envs from compat-table and get int version
-          const equalsVersion = parseFloat(equals.replace(env, ""));
-          // If the current version is smaller than the version that was mentioned
-          // in `equals` we can add an entry, as older versions should include features
-          // that newer ones have
-          if (!isNaN(equalsVersion) && equalsVersion <= version) {
-            if (!a[equals]) a[equals] = [];
-            if (a[equals].indexOf(b) >= 0) return;
-            a[equals].push(b);
-          }
-        });
-        return true;
-      }
-    });
-
-    return a;
-  }, {});
-
-const compatibilityTests = flattenDeep([
-  es6Data,
-  es6PlusData,
-].map((data) =>
-  data.tests.map((test) => {
-    return test.subtests ?
-      [test, renameTests(test.subtests, (name) => test.name + " / " + name)] :
-      test;
-  })
-));
-
-const getLowestImplementedVersion = ({ features }, env) => {
-  const tests = flatten(compatibilityTests
-    .filter((test) => {
-      return features.indexOf(test.name) >= 0 ||
-      // for features === ["DataView"]
-      // it covers "DataView (Int8)" and "DataView (UInt8)"
-      features.length === 1 && test.name.indexOf(features[0]) === 0;
-    })
-    .map((test) => {
-      const isBuiltIn = test.category === "built-ins" || test.category === "built-in extensions";
-
-      return test.subtests ?
-        test.subtests.map((subtest) => ({
-          name: `${test.name}/${subtest.name}`,
-          res: subtest.res,
-          isBuiltIn
-        })) :
-      {
-        name: test.name,
-        res: test.res,
-        isBuiltIn
-      };
-    })
-  );
-
-  const envTests = tests
-    .map(({ res: test, name, isBuiltIn }, i) => {
-      // Babel itself doesn't implement the feature correctly,
-      // don't count against it
-      // only doing this for built-ins atm
-      if (!test.babel && isBuiltIn) {
-        return "-1";
-      }
-
-      // `equals` in compat-table
-      Object.keys(test).forEach((t) => {
-        const invertedEnvs = invertedEqualsEnv[envMap[t] || t];
-        if (invertedEnvs) {
-          invertedEnvs.forEach((inv) => {
-            test[inv] = test[t];
-          });
+const invertedEqualsEnv = Object.keys(envs).filter(b => envs[b].equals).reduce((
+  a,
+  b,
+) => {
+  const checkEnv = envMap[envs[b].equals] || envs[b].equals;
+  environments.some(env => {
+    // go through all environment names to find the the current one
+    // and try to get the version as integer
+    const version = parseFloat(checkEnv.replace(env, ""));
+    if (!isNaN(version)) {
+      Object.keys(envs).forEach(equals => {
+        equals = envMap[equals] || equals;
+        // Go through all envs from compat-table and get int version
+        const equalsVersion = parseFloat(equals.replace(env, ""));
+        // If the current version is smaller than the version that was mentioned
+        // in `equals` we can add an entry, as older versions should include features
+        // that newer ones have
+        if (!isNaN(equalsVersion) && equalsVersion <= version) {
+          if (!a[equals]) a[equals] = [];
+          if (a[equals].indexOf(b) >= 0) return;
+          a[equals].push(b);
         }
       });
+      return true;
+    }
+  });
 
-      return Object.keys(test)
-      .filter((t) => t.startsWith(env))
-      // Babel assumes strict mode
-      .filter((test) => tests[i].res[test] === true || tests[i].res[test] === "strict")
-      // normalize some keys
-      .map((test) => envMap[test] || test)
-      .filter((test) => !isNaN(parseFloat(test.replace(env, ""))))
-      .shift();
+  return a;
+}, {});
+
+const compatibilityTests = flattenDeep(
+  [es6Data, es6PlusData].map(data =>
+    data.tests.map(test => {
+      return test.subtests
+        ? [test, renameTests(test.subtests, name => test.name + " / " + name)]
+        : test;
+    })),
+);
+
+const getLowestImplementedVersion = ({ features }, env) => {
+  const tests = flatten(
+    compatibilityTests
+      .filter(test => {
+        return features.indexOf(test.name) >= 0 ||
+          // for features === ["DataView"]
+          // it covers "DataView (Int8)" and "DataView (UInt8)"
+          (features.length === 1 && test.name.indexOf(features[0]) === 0);
+      })
+      .map(test => {
+        const isBuiltIn = test.category === "built-ins" ||
+          test.category === "built-in extensions";
+
+        return test.subtests
+          ? test.subtests.map(subtest => ({
+              name: `${test.name}/${subtest.name}`,
+              res: subtest.res,
+              isBuiltIn,
+            }))
+          : {
+              name: test.name,
+              res: test.res,
+              isBuiltIn,
+            };
+      }),
+  );
+
+  const envTests = tests.map(({ res: test, name, isBuiltIn }, i) => {
+    // Babel itself doesn't implement the feature correctly,
+    // don't count against it
+    // only doing this for built-ins atm
+    if (!test.babel && isBuiltIn) {
+      return "-1";
+    }
+
+    // `equals` in compat-table
+    Object.keys(test).forEach(t => {
+      const invertedEnvs = invertedEqualsEnv[envMap[t] || t];
+      if (invertedEnvs) {
+        invertedEnvs.forEach(inv => {
+          test[inv] = test[t];
+        });
+      }
     });
 
-  const envFiltered = envTests.filter((t) => t);
+    return (
+      Object.keys(test)
+        .filter(t => t.startsWith(env))
+        // Babel assumes strict mode
+        .filter(
+          test =>
+            tests[i].res[test] === true || tests[i].res[test] === "strict",
+        )
+        // normalize some keys
+        .map(test => envMap[test] || test)
+        .filter(test => !isNaN(parseFloat(test.replace(env, ""))))
+        .shift()
+    );
+  });
+
+  const envFiltered = envTests.filter(t => t);
   if (envTests.length > envFiltered.length || envTests.length === 0) {
     // envTests.forEach((test, i) => {
     //   if (!test) {
@@ -158,21 +163,21 @@ const getLowestImplementedVersion = ({ features }, env) => {
     return null;
   }
 
-  return envTests
-    .map((str) => Number(str.replace(env, "")))
-    .reduce((a, b) => { return (a < b) ? b : a; });
+  return envTests.map(str => Number(str.replace(env, ""))).reduce((a, b) => {
+    return a < b ? b : a;
+  });
 };
 
 const generateData = (environments, features) => {
-  return mapValues(features, (options) => {
+  return mapValues(features, options => {
     if (!options.features) {
       options = {
-        features: [options]
+        features: [options],
       };
     }
 
     const plugin = {};
-    environments.forEach((env) => {
+    environments.forEach(env => {
       const version = getLowestImplementedVersion(options, env);
       if (version !== null) {
         plugin[env] = version;
@@ -194,10 +199,10 @@ const generateData = (environments, features) => {
 
 fs.writeFileSync(
   path.join(__dirname, "../data/plugins.json"),
-  JSON.stringify(generateData(environments, pluginFeatures), null, 2) + "\n"
+  JSON.stringify(generateData(environments, pluginFeatures), null, 2) + "\n",
 );
 
 fs.writeFileSync(
   path.join(__dirname, "../data/built-ins.json"),
-  JSON.stringify(generateData(environments, builtInFeatures), null, 2) + "\n"
+  JSON.stringify(generateData(environments, builtInFeatures), null, 2) + "\n",
 );
diff --git a/experimental/babel-preset-env/src/default-includes.js b/experimental/babel-preset-env/src/default-includes.js
index 77477580e7..80d5665fbf 100644
--- a/experimental/babel-preset-env/src/default-includes.js
+++ b/experimental/babel-preset-env/src/default-includes.js
@@ -1,5 +1 @@
-export default [
-  "web.timers",
-  "web.immediate",
-  "web.dom.iterable"
-];
+export default ["web.timers", "web.immediate", "web.dom.iterable"];
diff --git a/experimental/babel-preset-env/src/index.js b/experimental/babel-preset-env/src/index.js
index ae26ecf8e3..a4f5f31fc5 100644
--- a/experimental/babel-preset-env/src/index.js
+++ b/experimental/babel-preset-env/src/index.js
@@ -2,9 +2,12 @@ import browserslist from "browserslist";
 import builtInsList from "../data/built-ins.json";
 import defaultInclude from "./default-includes";
 import moduleTransformations from "./module-transformations";
-import normalizeOptions, { getElectronChromeVersion } from "./normalize-options.js";
+import normalizeOptions, {
+  getElectronChromeVersion,
+} from "./normalize-options.js";
 import pluginList from "../data/plugins.json";
-import transformPolyfillRequirePlugin from "./transform-polyfill-require-plugin";
+import transformPolyfillRequirePlugin
+  from "./transform-polyfill-require-plugin";
 
 /**
  * Determine if a transformation is required
@@ -21,28 +24,33 @@ export const isPluginRequired = (supportedEnvironments, plugin) => {
 
   const targetEnvironments = Object.keys(supportedEnvironments);
 
-  if (targetEnvironments.length === 0) { return true; }
+  if (targetEnvironments.length === 0) {
+    return true;
+  }
 
-  const isRequiredForEnvironments = targetEnvironments
-    .filter((environment) => {
-      // Feature is not implemented in that environment
-      if (!plugin[environment]) { return true; }
+  const isRequiredForEnvironments = targetEnvironments.filter(environment => {
+    // Feature is not implemented in that environment
+    if (!plugin[environment]) {
+      return true;
+    }
 
-      const lowestImplementedVersion = plugin[environment];
-      const lowestTargetedVersion = supportedEnvironments[environment];
+    const lowestImplementedVersion = plugin[environment];
+    const lowestTargetedVersion = supportedEnvironments[environment];
 
-      if (typeof lowestTargetedVersion === "string") {
-        throw new Error(`Target version must be a number,
-          '${lowestTargetedVersion}' was given for '${environment}'`);
-      }
+    if (typeof lowestTargetedVersion === "string") {
+      throw new Error(
+        `Target version must be a number,
+          '${lowestTargetedVersion}' was given for '${environment}'`,
+      );
+    }
 
-      return lowestTargetedVersion < lowestImplementedVersion;
-    });
+    return lowestTargetedVersion < lowestImplementedVersion;
+  });
 
   return isRequiredForEnvironments.length > 0 ? true : false;
 };
 
-const isBrowsersQueryValid = (browsers) => {
+const isBrowsersQueryValid = browsers => {
   return typeof browsers === "string" || Array.isArray(browsers);
 };
 
@@ -52,46 +60,55 @@ const browserNameMap = {
   firefox: "firefox",
   ie: "ie",
   ios_saf: "ios",
-  safari: "safari"
+  safari: "safari",
 };
 
-const getLowestVersions = (browsers) => {
-  return browsers.reduce((all, browser) => {
-    const [browserName, browserVersion] = browser.split(" ");
-    const normalizedBrowserName = browserNameMap[browserName];
-    const parsedBrowserVersion = parseInt(browserVersion);
-    if (normalizedBrowserName && !isNaN(parsedBrowserVersion)) {
-      all[normalizedBrowserName] = Math.min(all[normalizedBrowserName] || Infinity, parsedBrowserVersion);
-    }
-    return all;
-  }, {});
+const getLowestVersions = browsers => {
+  return browsers.reduce(
+    (all, browser) => {
+      const [browserName, browserVersion] = browser.split(" ");
+      const normalizedBrowserName = browserNameMap[browserName];
+      const parsedBrowserVersion = parseInt(browserVersion);
+      if (normalizedBrowserName && !isNaN(parsedBrowserVersion)) {
+        all[normalizedBrowserName] = Math.min(
+          all[normalizedBrowserName] || Infinity,
+          parsedBrowserVersion,
+        );
+      }
+      return all;
+    },
+    {},
+  );
 };
 
 const mergeBrowsers = (fromQuery, fromTarget) => {
-  return Object.keys(fromTarget).reduce((queryObj, targKey) => {
-    if (targKey !== "browsers") {
-      queryObj[targKey] = fromTarget[targKey];
-    }
-    return queryObj;
-  }, fromQuery);
+  return Object.keys(fromTarget).reduce(
+    (queryObj, targKey) => {
+      if (targKey !== "browsers") {
+        queryObj[targKey] = fromTarget[targKey];
+      }
+      return queryObj;
+    },
+    fromQuery,
+  );
 };
 
 export const getCurrentNodeVersion = () => {
   return parseFloat(process.versions.node);
 };
 
-const _extends = Object.assign || function (target) {
-  for (let i = 1; i < arguments.length; i++) {
-    const source = arguments[i];
-    for (const key in source) {
-      if (Object.prototype.hasOwnProperty.call(source, key)) {
-        target[key] = source[key];
+const _extends = Object.assign ||
+  function(target) {
+    for (let i = 1; i < arguments.length; i++) {
+      const source = arguments[i];
+      for (const key in source) {
+        if (Object.prototype.hasOwnProperty.call(source, key)) {
+          target[key] = source[key];
+        }
       }
     }
-  }
-  return target;
-};
-
+    return target;
+  };
 
 export const getTargets = (targets = {}) => {
   const targetOpts = _extends({}, targets);
@@ -127,13 +144,15 @@ let hasBeenLogged = false;
 
 const logPlugin = (plugin, targets, list) => {
   const envList = list[plugin] || {};
-  const filteredList = Object.keys(targets)
-  .reduce((a, b) => {
-    if (!envList[b] || targets[b] < envList[b]) {
-      a[b] = targets[b];
-    }
-    return a;
-  }, {});
+  const filteredList = Object.keys(targets).reduce(
+    (a, b) => {
+      if (!envList[b] || targets[b] < envList[b]) {
+        a[b] = targets[b];
+      }
+      return a;
+    },
+    {},
+  );
   const logStr = `  ${plugin} ${JSON.stringify(filteredList)}`;
   console.log(logStr);
 };
@@ -147,7 +166,7 @@ const filterItem = (targets, exclusions, list, item) => {
   return isRequired && notExcluded;
 };
 
-const getBuiltInTargets = (targets) => {
+const getBuiltInTargets = targets => {
   const builtInTargets = _extends({}, targets);
   if (builtInTargets.uglify != null) {
     delete builtInTargets.uglify;
@@ -155,10 +174,10 @@ const getBuiltInTargets = (targets) => {
   return builtInTargets;
 };
 
-export const transformIncludesAndExcludes = (opts) => ({
+export const transformIncludesAndExcludes = opts => ({
   all: opts,
-  plugins: opts.filter((opt) => !opt.match(/^(es\d+|web)\./)),
-  builtIns: opts.filter((opt) => opt.match(/^(es\d+|web)\./))
+  plugins: opts.filter(opt => !opt.match(/^(es\d+|web)\./)),
+  builtIns: opts.filter(opt => opt.match(/^(es\d+|web)\./)),
 });
 
 export default function buildPreset(context, opts = {}) {
@@ -169,8 +188,12 @@ export default function buildPreset(context, opts = {}) {
   const include = transformIncludesAndExcludes(validatedOptions.include);
   const exclude = transformIncludesAndExcludes(validatedOptions.exclude);
 
-
-  const filterPlugins = filterItem.bind(null, targets, exclude.plugins, pluginList);
+  const filterPlugins = filterItem.bind(
+    null,
+    targets,
+    exclude.plugins,
+    pluginList,
+  );
   const transformations = Object.keys(pluginList)
     .filter(filterPlugins)
     .concat(include.plugins);
@@ -179,7 +202,12 @@ export default function buildPreset(context, opts = {}) {
   let polyfillTargets;
   if (useBuiltIns) {
     polyfillTargets = getBuiltInTargets(targets);
-    const filterBuiltIns = filterItem.bind(null, polyfillTargets, exclude.builtIns, builtInsList);
+    const filterBuiltIns = filterItem.bind(
+      null,
+      polyfillTargets,
+      exclude.builtIns,
+      builtInsList,
+    );
     polyfills = Object.keys(builtInsList)
       .concat(defaultInclude)
       .filter(filterBuiltIns)
@@ -193,32 +221,36 @@ export default function buildPreset(context, opts = {}) {
     console.log(JSON.stringify(targets, null, 2));
     console.log(`\nModules transform: ${moduleType}`);
     console.log("\nUsing plugins:");
-    transformations.forEach((transform) => {
+    transformations.forEach(transform => {
       logPlugin(transform, targets, pluginList);
     });
     if (useBuiltIns && polyfills.length) {
       console.log("\nUsing polyfills:");
-      polyfills.forEach((polyfill) => {
+      polyfills.forEach(polyfill => {
         logPlugin(polyfill, polyfillTargets, builtInsList);
       });
     }
   }
 
   const regenerator = transformations.indexOf("transform-regenerator") >= 0;
-  const modulePlugin = moduleType !== false && moduleTransformations[moduleType];
+  const modulePlugin = moduleType !== false &&
+    moduleTransformations[moduleType];
   const plugins = [];
 
   modulePlugin &&
     plugins.push([require(`babel-plugin-${modulePlugin}`), { loose }]);
 
-  plugins.push(...transformations.map((pluginName) =>
-    [require(`babel-plugin-${pluginName}`), { loose }]
-  ));
+  plugins.push(
+    ...transformations.map(pluginName => [
+      require(`babel-plugin-${pluginName}`),
+      { loose },
+    ]),
+  );
 
   useBuiltIns &&
     plugins.push([transformPolyfillRequirePlugin, { polyfills, regenerator }]);
 
   return {
-    plugins
+    plugins,
   };
 }
diff --git a/experimental/babel-preset-env/src/module-transformations.js b/experimental/babel-preset-env/src/module-transformations.js
index f966f01a18..1a4b6106c9 100644
--- a/experimental/babel-preset-env/src/module-transformations.js
+++ b/experimental/babel-preset-env/src/module-transformations.js
@@ -1,6 +1,6 @@
 export default {
-  "amd": "transform-es2015-modules-amd",
-  "commonjs": "transform-es2015-modules-commonjs",
-  "systemjs": "transform-es2015-modules-systemjs",
-  "umd": "transform-es2015-modules-umd"
+  amd: "transform-es2015-modules-amd",
+  commonjs: "transform-es2015-modules-commonjs",
+  systemjs: "transform-es2015-modules-systemjs",
+  umd: "transform-es2015-modules-umd",
 };
diff --git a/experimental/babel-preset-env/src/normalize-options.js b/experimental/babel-preset-env/src/normalize-options.js
index 0c7ba71711..d0b982b068 100644
--- a/experimental/babel-preset-env/src/normalize-options.js
+++ b/experimental/babel-preset-env/src/normalize-options.js
@@ -7,19 +7,19 @@ import pluginFeatures from "../data/plugin-features";
 
 const validIncludesAndExcludes = [
   ...Object.keys(pluginFeatures),
-  ...Object.keys(moduleTransformations).map((m) => moduleTransformations[m]),
+  ...Object.keys(moduleTransformations).map(m => moduleTransformations[m]),
   ...Object.keys(builtInsList),
-  ...defaultInclude
+  ...defaultInclude,
 ];
 
 export const validateIncludesAndExcludes = (opts = [], type) => {
   invariant(
     Array.isArray(opts),
-    `Invalid Option: The '${type}' option must be an Array<String> of plugins/built-ins`
+    `Invalid Option: The '${type}' option must be an Array<String> of plugins/built-ins`,
   );
 
   const unknownOpts = [];
-  opts.forEach((opt) => {
+  opts.forEach(opt => {
     if (validIncludesAndExcludes.indexOf(opt) === -1) {
       unknownOpts.push(opt);
     }
@@ -28,21 +28,19 @@ export const validateIncludesAndExcludes = (opts = [], type) => {
   invariant(
     unknownOpts.length === 0,
     `Invalid Option: The plugins/built-ins '${unknownOpts}' passed to the '${type}' option are not
-    valid. Please check data/[plugin-features|built-in-features].js in babel-preset-env`
+    valid. Please check data/[plugin-features|built-in-features].js in babel-preset-env`,
   );
 
   return opts;
 };
 
 export const checkDuplicateIncludeExcludes = (include = [], exclude = []) => {
-  const duplicates = include.filter(
-    (opt) => exclude.indexOf(opt) >= 0
-  );
+  const duplicates = include.filter(opt => exclude.indexOf(opt) >= 0);
 
   invariant(
     duplicates.length === 0,
     `Invalid Option: The plugins/built-ins '${duplicates}' were found in both the "include" and
-    "exclude" options.`
+    "exclude" options.`,
   );
 };
 
@@ -52,7 +50,7 @@ export const checkDuplicateIncludeExcludes = (include = [], exclude = []) => {
 export const validateLooseOption = (looseOpt = false) => {
   invariant(
     typeof looseOpt === "boolean",
-    "Invalid Option: The 'loose' option must be a boolean."
+    "Invalid Option: The 'loose' option must be a boolean.",
   );
 
   return looseOpt;
@@ -60,20 +58,24 @@ export const validateLooseOption = (looseOpt = false) => {
 
 export const validateModulesOption = (modulesOpt = "commonjs") => {
   invariant(
-    modulesOpt === false || Object.keys(moduleTransformations).indexOf(modulesOpt) > -1,
+    modulesOpt === false ||
+      Object.keys(moduleTransformations).indexOf(modulesOpt) > -1,
     `Invalid Option: The 'modules' option must be either 'false' to indicate no modules, or a
-    module type which can be be one of: 'commonjs' (default), 'amd', 'umd', 'systemjs'.`
+    module type which can be be one of: 'commonjs' (default), 'amd', 'umd', 'systemjs'.`,
   );
 
   return modulesOpt;
 };
 
-export const getElectronChromeVersion = (electronVersion) => {
-  const electronChromeVersion = parseInt(electronToChromium(electronVersion), 10);
+export const getElectronChromeVersion = electronVersion => {
+  const electronChromeVersion = parseInt(
+    electronToChromium(electronVersion),
+    10,
+  );
 
   invariant(
     !!electronChromeVersion,
-    `Electron version ${electronVersion} is either too old or too new`
+    `Electron version ${electronVersion} is either too old or too new`,
   );
 
   return electronChromeVersion;
@@ -89,6 +91,6 @@ export default function normalizeOptions(opts) {
     loose: validateLooseOption(opts.loose),
     moduleType: validateModulesOption(opts.modules),
     targets: opts.targets,
-    useBuiltIns: opts.useBuiltIns
+    useBuiltIns: opts.useBuiltIns,
   };
 }
diff --git a/experimental/babel-preset-env/src/transform-polyfill-require-plugin.js b/experimental/babel-preset-env/src/transform-polyfill-require-plugin.js
index 8ddbea3e1a..6ca42eb49c 100644
--- a/experimental/babel-preset-env/src/transform-polyfill-require-plugin.js
+++ b/experimental/babel-preset-env/src/transform-polyfill-require-plugin.js
@@ -2,7 +2,7 @@ function isPolyfillSource(value) {
   return value === "babel-polyfill" || value === "core-js";
 }
 
-export default function ({ types: t }) {
+export default function({ types: t }) {
   function createImportDeclaration(polyfill) {
     const declar = t.importDeclaration([], t.stringLiteral(polyfill));
     declar._blockHoist = 3;
@@ -11,12 +11,7 @@ export default function ({ types: t }) {
 
   function createRequireStatement(polyfill) {
     return t.expressionStatement(
-      t.callExpression(
-        t.identifier("require"),
-        [
-          t.stringLiteral(polyfill)
-        ]
-      )
+      t.callExpression(t.identifier("require"), [t.stringLiteral(polyfill)]),
     );
   }
 
@@ -44,19 +39,21 @@ export default function ({ types: t }) {
 
   function createImports(polyfills, requireType, regenerator) {
     const imports = polyfills
-    .filter((el, i, arr) => arr.indexOf(el) === i)
-    .map((polyfill) => createImport(polyfill, requireType, true));
+      .filter((el, i, arr) => arr.indexOf(el) === i)
+      .map(polyfill => createImport(polyfill, requireType, true));
 
     return [
       ...imports,
-      regenerator && createImport("regenerator-runtime/runtime", requireType)
+      regenerator && createImport("regenerator-runtime/runtime", requireType),
     ].filter(Boolean);
   }
 
   const isPolyfillImport = {
     ImportDeclaration(path, state) {
-      if (path.node.specifiers.length === 0 &&
-          isPolyfillSource(path.node.source.value)) {
+      if (
+        path.node.specifiers.length === 0 &&
+        isPolyfillSource(path.node.source.value)
+      ) {
         this.numPolyfillImports++;
         if (this.numPolyfillImports > 1) {
           path.remove();
@@ -64,19 +61,21 @@ export default function ({ types: t }) {
         }
 
         path.replaceWithMultiple(
-          createImports(state.opts.polyfills, "import", state.opts.regenerator)
+          createImports(state.opts.polyfills, "import", state.opts.regenerator),
         );
       }
     },
     Program(path, state) {
       if (!state.opts.polyfills) {
-        throw path.buildCodeFrameError(`
+        throw path.buildCodeFrameError(
+          `
 There was an issue in "babel-preset-env" such that
 the "polyfills" option was not correctly passed
 to the "transform-polyfill-require" plugin
-`);
+`,
+        );
       }
-      path.get("body").forEach((bodyPath) => {
+      path.get("body").forEach(bodyPath => {
         if (isRequire(bodyPath)) {
           this.numPolyfillImports++;
           if (this.numPolyfillImports > 1) {
@@ -85,11 +84,15 @@ to the "transform-polyfill-require" plugin
           }
 
           bodyPath.replaceWithMultiple(
-            createImports(state.opts.polyfills, "require", state.opts.regenerator)
+            createImports(
+              state.opts.polyfills,
+              "require",
+              state.opts.regenerator,
+            ),
           );
         }
       });
-    }
+    },
   };
 
   return {
@@ -97,6 +100,6 @@ to the "transform-polyfill-require" plugin
     visitor: isPolyfillImport,
     pre() {
       this.numPolyfillImports = 0;
-    }
+    },
   };
 }
diff --git a/experimental/babel-preset-env/test/debug-fixtures.js b/experimental/babel-preset-env/test/debug-fixtures.js
index 76fcbf1509..6208f8e371 100644
--- a/experimental/babel-preset-env/test/debug-fixtures.js
+++ b/experimental/babel-preset-env/test/debug-fixtures.js
@@ -14,8 +14,8 @@ const clear = () => {
   process.chdir(tmpLoc);
 };
 
-const saveInFiles = (files) => {
-  Object.keys(files).forEach((filename) => {
+const saveInFiles = files => {
+  Object.keys(files).forEach(filename => {
     const content = files[filename];
     fs.outputFileSync(filename, content);
   });
@@ -41,10 +41,10 @@ const assertTest = (stdout, stderr, opts) => {
   }
 };
 
-const buildTest = (opts) => {
+const buildTest = opts => {
   const binLoc = path.join(process.cwd(), "node_modules/.bin/babel");
 
-  return (callback) => {
+  return callback => {
     clear();
     saveInFiles(opts.inFiles);
 
@@ -56,8 +56,8 @@ const buildTest = (opts) => {
     let stdout = "";
     let stderr = "";
 
-    spawn.stdout.on("data", (chunk) => stdout += chunk);
-    spawn.stderr.on("data", (chunk) => stderr += chunk);
+    spawn.stdout.on("data", chunk => stdout += chunk);
+    spawn.stderr.on("data", chunk => stderr += chunk);
 
     spawn.on("close", () => {
       let err;
@@ -74,7 +74,7 @@ const buildTest = (opts) => {
 };
 
 describe("debug output", () => {
-  fs.readdirSync(fixtureLoc).forEach((testName) => {
+  fs.readdirSync(fixtureLoc).forEach(testName => {
     const testLoc = path.join(fixtureLoc, testName);
 
     const opts = {
@@ -91,7 +91,9 @@ describe("debug output", () => {
     const optionsLoc = path.join(testLoc, "options.json");
 
     if (!fs.existsSync(optionsLoc)) {
-      throw new Error(`Debug test '${testName}' is missing an options.json file`);
+      throw new Error(
+        `Debug test '${testName}' is missing an options.json file`,
+      );
     }
 
     opts.inFiles = {
diff --git a/experimental/babel-preset-env/test/index.spec.js b/experimental/babel-preset-env/test/index.spec.js
index f3b82ddc6c..9bdef6fb6e 100644
--- a/experimental/babel-preset-env/test/index.spec.js
+++ b/experimental/babel-preset-env/test/index.spec.js
@@ -6,104 +6,131 @@ const { versions: electronToChromiumData } = require("electron-to-chromium");
 
 describe("babel-preset-env", () => {
   describe("getTargets", () => {
-    it("should return the current node version with option 'current'", function() {
-      assert.deepEqual(babelPresetEnv.getTargets({
-        node: true
-      }), {
-        node: parseFloat(process.versions.node)
-      });
+    it("should return the current node version with option 'current'", () => {
+      assert.deepEqual(
+        babelPresetEnv.getTargets({
+          node: true,
+        }),
+        {
+          node: parseFloat(process.versions.node),
+        },
+      );
 
-      assert.deepEqual(babelPresetEnv.getTargets({
-        node: "current"
-      }), {
-        node: parseFloat(process.versions.node)
-      });
+      assert.deepEqual(
+        babelPresetEnv.getTargets({
+          node: "current",
+        }),
+        {
+          node: parseFloat(process.versions.node),
+        },
+      );
     });
   });
 
   describe("getTargets + electron", () => {
-    it("should work with a string", function() {
-      assert.deepEqual(babelPresetEnv.getTargets({
-        electron: "1.0"
-      }), {
-        chrome: 49
-      });
+    it("should work with a string", () => {
+      assert.deepEqual(
+        babelPresetEnv.getTargets({
+          electron: "1.0",
+        }),
+        {
+          chrome: 49,
+        },
+      );
     });
 
-    it("should work with a number", function() {
-      assert.deepEqual(babelPresetEnv.getTargets({
-        electron: 1.0
-      }), {
-        chrome: 49
-      });
+    it("should work with a number", () => {
+      assert.deepEqual(
+        babelPresetEnv.getTargets({
+          electron: 1.0,
+        }),
+        {
+          chrome: 49,
+        },
+      );
     });
 
-
-    it("should preserve lower Chrome number if Electron version is more recent", function() {
-      assert.deepEqual(babelPresetEnv.getTargets({
-        electron: 1.4,
-        chrome: 50
-      }), {
-        chrome: 50
-      });
+    it("should preserve lower Chrome number if Electron version is more recent", () => {
+      assert.deepEqual(
+        babelPresetEnv.getTargets({
+          electron: 1.4,
+          chrome: 50,
+        }),
+        {
+          chrome: 50,
+        },
+      );
     });
 
-    it("should overwrite Chrome number if Electron version is older", function() {
-      assert.deepEqual(babelPresetEnv.getTargets({
-        electron: 1.0,
-        chrome: 50
-      }), {
-        chrome: 49
-      });
+    it("should overwrite Chrome number if Electron version is older", () => {
+      assert.deepEqual(
+        babelPresetEnv.getTargets({
+          electron: 1.0,
+          chrome: 50,
+        }),
+        {
+          chrome: 49,
+        },
+      );
     });
 
-    Object.keys(electronToChromiumData).forEach((electronVersion) => {
-      it(`"should work for Electron: ${electronVersion}`, function() {
-        assert.deepEqual(babelPresetEnv.getTargets({
-          electron: electronVersion
-        }), {
-          chrome: electronToChromiumData[electronVersion]
-        });
+    Object.keys(electronToChromiumData).forEach(electronVersion => {
+      it(`"should work for Electron: ${electronVersion}`, () => {
+        assert.deepEqual(
+          babelPresetEnv.getTargets({
+            electron: electronVersion,
+          }),
+          {
+            chrome: electronToChromiumData[electronVersion],
+          },
+        );
       });
     });
 
     it("should error if electron version is invalid", () => {
-      const fixtures = [
-        "0.19",
-        0.19,
-        999,
-        "999",
-      ];
+      const fixtures = ["0.19", 0.19, 999, "999"];
 
-      fixtures.forEach((electronVersion) => {
-        assert.throws(() => {
-          babelPresetEnv.getTargets({
-            electron: electronVersion,
-          });
-        }, Error);
+      fixtures.forEach(electronVersion => {
+        assert.throws(
+          () => {
+            babelPresetEnv.getTargets({
+              electron: electronVersion,
+            });
+          },
+          Error,
+        );
       });
     });
   });
 
   describe("getTargets + uglify", () => {
     it("should work with `true`", function() {
-      assert.deepEqual(babelPresetEnv.getTargets({
-        uglify: true
-      }), {
-        uglify: true
-      });
+      assert.deepEqual(
+        babelPresetEnv.getTargets({
+          uglify: true,
+        }),
+        {
+          uglify: true,
+        },
+      );
     });
 
     it("should ignore `false`", function() {
-      assert.deepEqual(babelPresetEnv.getTargets({
-        uglify: false
-      }), {});
+      assert.deepEqual(
+        babelPresetEnv.getTargets({
+          uglify: false,
+        }),
+        {},
+      );
     });
 
     it("should ignore `null`", function() {
-      assert.deepEqual(babelPresetEnv.getTargets({
-        uglify: null
-      }), {});
+      assert.deepEqual(
+        babelPresetEnv.getTargets({
+          uglify: null,
+        }),
+        {},
+      );
     });
   });
 
@@ -122,13 +149,13 @@ describe("babel-preset-env", () => {
       };
 
       targets = {
-        "chrome": Number.MAX_SAFE_INTEGER,
-        "firefox": Number.MAX_SAFE_INTEGER
+        chrome: Number.MAX_SAFE_INTEGER,
+        firefox: Number.MAX_SAFE_INTEGER,
       };
       assert(babelPresetEnv.isPluginRequired(targets, plugin) === false);
 
       targets = {
-        "edge": 12,
+        edge: 12,
       };
       assert(babelPresetEnv.isPluginRequired(plugin, plugin) === true);
     });
@@ -138,7 +165,7 @@ describe("babel-preset-env", () => {
         chrome: 49,
       };
       const targets = {
-        "chrome": Number.MAX_SAFE_INTEGER,
+        chrome: Number.MAX_SAFE_INTEGER,
       };
       assert(babelPresetEnv.isPluginRequired(targets, plugin) === false);
     });
@@ -148,7 +175,7 @@ describe("babel-preset-env", () => {
         chrome: 49,
       };
       const targets = {
-        "chrome": 49,
+        chrome: 49,
       };
       assert(babelPresetEnv.isPluginRequired(targets, plugin) === false);
     });
@@ -158,7 +185,7 @@ describe("babel-preset-env", () => {
         chrome: 50,
       };
       const targets = {
-        "chrome": 49,
+        chrome: 49,
       };
       assert(babelPresetEnv.isPluginRequired(targets, plugin) === true);
     });
@@ -168,7 +195,7 @@ describe("babel-preset-env", () => {
         chrome: 49,
       };
       const targets = {
-        "browsers": "chrome > 50"
+        browsers: "chrome > 50",
       };
       assert(babelPresetEnv.isPluginRequired(targets, plugin) === false);
     });
@@ -178,7 +205,7 @@ describe("babel-preset-env", () => {
         chrome: 52,
       };
       const targets = {
-        "browsers": "chrome > 50"
+        browsers: "chrome > 50",
       };
       assert(babelPresetEnv.isPluginRequired(targets, plugin) === true);
     });
@@ -189,7 +216,7 @@ describe("babel-preset-env", () => {
       };
       const targets = {
         browsers: "last 2 Chrome versions",
-        chrome: 44
+        chrome: 44,
       };
 
       assert(babelPresetEnv.isPluginRequired(targets, plugin) === true);
@@ -197,11 +224,11 @@ describe("babel-preset-env", () => {
 
     it("returns true if uglify is specified as a target", () => {
       const plugin = {
-        chrome: 50
+        chrome: 50,
       };
       const targets = {
         chrome: 55,
-        uglify: true
+        uglify: true,
       };
 
       assert(babelPresetEnv.isPluginRequired(targets, plugin) === true);
@@ -209,53 +236,61 @@ describe("babel-preset-env", () => {
 
     it("doesn't throw when specifying a decimal for node", () => {
       const plugin = {
-        node: 6
+        node: 6,
       };
 
       const targets = {
-        "node": 6.5
+        node: 6.5,
       };
 
-      assert.doesNotThrow(() => {
-        babelPresetEnv.isPluginRequired(targets, plugin);
-      }, Error);
+      assert.doesNotThrow(
+        () => {
+          babelPresetEnv.isPluginRequired(targets, plugin);
+        },
+        Error,
+      );
     });
 
     it("will throw if target version is not a number", () => {
       const plugin = {
-        "node": 6,
+        node: 6,
       };
 
       const targets = {
-        "node": "6.5",
+        node: "6.5",
       };
 
-      assert.throws(() => {
-        babelPresetEnv.isPluginRequired(targets, plugin);
-      }, Error);
+      assert.throws(
+        () => {
+          babelPresetEnv.isPluginRequired(targets, plugin);
+        },
+        Error,
+      );
     });
   });
 
-  describe("transformIncludesAndExcludes", function() {
-    it("should return in transforms array", function() {
+  describe("transformIncludesAndExcludes", () => {
+    it("should return in transforms array", () => {
       assert.deepEqual(
-        babelPresetEnv.transformIncludesAndExcludes(["transform-es2015-arrow-functions"]),
+        babelPresetEnv.transformIncludesAndExcludes([
+          "transform-es2015-arrow-functions",
+        ]),
         {
           all: ["transform-es2015-arrow-functions"],
           plugins: ["transform-es2015-arrow-functions"],
-          builtIns: []
-        }
+          builtIns: [],
+        },
       );
     });
 
-    it("should return in built-ins array", function() {
+    it("should return in built-ins array", () => {
       assert.deepEqual(
         babelPresetEnv.transformIncludesAndExcludes(["es6.map"]),
         {
           all: ["es6.map"],
           plugins: [],
-          builtIns: ["es6.map"]
-        }
+          builtIns: ["es6.map"],
+        },
       );
     });
   });
diff --git a/experimental/babel-preset-env/test/normalize-options.spec.js b/experimental/babel-preset-env/test/normalize-options.spec.js
index 3dbf16c9f6..e75f26e3df 100644
--- a/experimental/babel-preset-env/test/normalize-options.spec.js
+++ b/experimental/babel-preset-env/test/normalize-options.spec.js
@@ -7,7 +7,7 @@ const {
   checkDuplicateIncludeExcludes,
   validateIncludesAndExcludes,
   validateLooseOption,
-  validateModulesOption
+  validateModulesOption,
 } = normalizeOptions;
 
 describe("normalize-options", () => {
@@ -25,29 +25,35 @@ describe("normalize-options", () => {
     });
 
     it("array option is invalid", () => {
-      assert.throws(() => {
-        validateLooseOption([]);
-      }, Error);
+      assert.throws(
+        () => {
+          validateLooseOption([]);
+        },
+        Error,
+      );
     });
   });
 
   describe("checkDuplicateIncludeExcludes", function() {
     it("should throw if duplicate names in both", function() {
-      assert.throws(() => {
-        checkDuplicateIncludeExcludes(
-          ["transform-regenerator", "map"],
-          ["transform-regenerator", "map"]
-        );
-      }, Error);
+      assert.throws(
+        () => {
+          checkDuplicateIncludeExcludes(
+            ["transform-regenerator", "map"],
+            ["transform-regenerator", "map"],
+          );
+        },
+        Error,
+      );
     });
 
     it("should not throw if no duplicate names in both", function() {
-      assert.doesNotThrow(() => {
-        checkDuplicateIncludeExcludes(
-          ["transform-regenerator"],
-          ["map"]
-        );
-      }, Error);
+      assert.doesNotThrow(
+        () => {
+          checkDuplicateIncludeExcludes(["transform-regenerator"], ["map"]);
+        },
+        Error,
+      );
     });
   });
 
@@ -77,15 +83,21 @@ describe("normalize-options", () => {
     });
 
     it("`true` option is invalid", () => {
-      assert.throws(() => {
-        validateModulesOption(true);
-      }, Error);
+      assert.throws(
+        () => {
+          validateModulesOption(true);
+        },
+        Error,
+      );
     });
 
     it("array option is invalid", () => {
-      assert.throws(() => {
-        assert(validateModulesOption([]));
-      }, Error);
+      assert.throws(
+        () => {
+          assert(validateModulesOption([]));
+        },
+        Error,
+      );
     });
   });
   describe("validateIncludesAndExcludes", function() {
@@ -93,9 +105,12 @@ describe("normalize-options", () => {
       assert.deepEqual(validateIncludesAndExcludes(), []);
     });
     it("should throw if not in features", function() {
-      assert.throws(() => {
-        validateIncludesAndExcludes(["asdf"]);
-      }, Error);
+      assert.throws(
+        () => {
+          validateIncludesAndExcludes(["asdf"]);
+        },
+        Error,
+      );
     });
   });
 });
diff --git a/experimental/babel-preset-env/yarn.lock b/experimental/babel-preset-env/yarn.lock
index 617f09fe61..fb4ed35e8d 100644
--- a/experimental/babel-preset-env/yarn.lock
+++ b/experimental/babel-preset-env/yarn.lock
@@ -57,7 +57,7 @@ amdefine@>=0.0.4:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"
 
-ansi-escapes@^1.1.0:
+ansi-escapes@^1.0.0, ansi-escapes@^1.1.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-1.4.0.tgz#d3a8a83b319aa67793662b13e761c7911422306e"
 
@@ -69,6 +69,12 @@ ansi-styles@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-2.2.1.tgz#b432dd3358b634cf75e1e4664368240533c1ddbe"
 
+ansi-styles@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.0.0.tgz#5404e93a544c4fec7f048262977bebfe3155e0c1"
+  dependencies:
+    color-convert "^1.0.0"
+
 ansidiff@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/ansidiff/-/ansidiff-1.0.0.tgz#d4a3ed89ab1670f20c097def759f34d944478aab"
@@ -82,6 +88,10 @@ anymatch@^1.3.0:
     arrify "^1.0.0"
     micromatch "^2.1.5"
 
+app-root-path@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/app-root-path/-/app-root-path-2.0.1.tgz#cd62dcf8e4fd5a417efc664d2e5b10653c651b46"
+
 append-transform@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/append-transform/-/append-transform-0.4.0.tgz#d76ebf8ca94d276e247a36bad44a4b74ab611991"
@@ -164,6 +174,14 @@ assertion-error@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.0.2.tgz#13ca515d86206da0bac66e834dd397d87581094c"
 
+ast-types@0.8.18:
+  version "0.8.18"
+  resolved "https://registry.yarnpkg.com/ast-types/-/ast-types-0.8.18.tgz#c8b98574898e8914e9d8de74b947564a9fe929af"
+
+ast-types@0.9.4:
+  version "0.9.4"
+  resolved "https://registry.yarnpkg.com/ast-types/-/ast-types-0.9.4.tgz#410d1f81890aeb8e0a38621558ba5869ae53c91b"
+
 ast-types@0.9.5:
   version "0.9.5"
   resolved "https://registry.yarnpkg.com/ast-types/-/ast-types-0.9.5.tgz#1a660a09945dbceb1f9c9cbb715002617424e04a"
@@ -211,17 +229,17 @@ babel-cli@7.0.0-alpha.1:
   optionalDependencies:
     chokidar "^1.6.1"
 
-babel-code-frame@7.0.0-alpha.1:
-  version "7.0.0-alpha.1"
-  resolved "https://registry.yarnpkg.com/babel-code-frame/-/babel-code-frame-7.0.0-alpha.1.tgz#d72908f1401d27e1f75eb872d4d8553f4c5bfcd0"
+babel-code-frame@6.22.0, babel-code-frame@^6.16.0, babel-code-frame@^6.22.0:
+  version "6.22.0"
+  resolved "https://registry.yarnpkg.com/babel-code-frame/-/babel-code-frame-6.22.0.tgz#027620bee567a88c32561574e7fd0801d33118e4"
   dependencies:
     chalk "^1.1.0"
     esutils "^2.0.2"
     js-tokens "^3.0.0"
 
-babel-code-frame@^6.16.0, babel-code-frame@^6.22.0:
-  version "6.22.0"
-  resolved "https://registry.yarnpkg.com/babel-code-frame/-/babel-code-frame-6.22.0.tgz#027620bee567a88c32561574e7fd0801d33118e4"
+babel-code-frame@7.0.0-alpha.1:
+  version "7.0.0-alpha.1"
+  resolved "https://registry.yarnpkg.com/babel-code-frame/-/babel-code-frame-7.0.0-alpha.1.tgz#d72908f1401d27e1f75eb872d4d8553f4c5bfcd0"
   dependencies:
     chalk "^1.1.0"
     esutils "^2.0.2"
@@ -1283,6 +1301,10 @@ babel-types@^6.15.0, babel-types@^6.18.0, babel-types@^6.19.0, babel-types@^6.22
     lodash "^4.2.0"
     to-fast-properties "^1.0.1"
 
+babylon@6.15.0:
+  version "6.15.0"
+  resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.15.0.tgz#ba65cfa1a80e1759b0e89fb562e27dccae70348e"
+
 babylon@7.0.0-beta.4:
   version "7.0.0-beta.4"
   resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.4.tgz#82db799d2667f61bbaf34456dbfa91c37613459d"
@@ -1414,7 +1436,7 @@ chai@^3.0.0, chai@^3.5.0:
     deep-eql "^0.1.3"
     type-detect "^1.0.0"
 
-chalk@^1.0.0, chalk@^1.1.0, chalk@^1.1.1, chalk@^1.1.3:
+chalk@1.1.3, chalk@^1.0.0, chalk@^1.1.0, chalk@^1.1.1, chalk@^1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-1.1.3.tgz#a8115c55e4a702fe4d150abd3872822a7e09fc98"
   dependencies:
@@ -1451,16 +1473,31 @@ chokidar@^1.6.1:
   optionalDependencies:
     fsevents "^1.0.0"
 
+ci-info@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-1.0.0.tgz#dc5285f2b4e251821683681c381c3388f46ec534"
+
 circular-json@^0.3.1:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/circular-json/-/circular-json-0.3.1.tgz#be8b36aefccde8b3ca7aa2d6afc07a37242c0d2d"
 
-cli-cursor@^1.0.1:
+cli-cursor@^1.0.1, cli-cursor@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/cli-cursor/-/cli-cursor-1.0.2.tgz#64da3f7d56a54412e59794bd62dc35295e8f2987"
   dependencies:
     restore-cursor "^1.0.1"
 
+cli-spinners@^0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/cli-spinners/-/cli-spinners-0.1.2.tgz#bb764d88e185fb9e1e6a2a1f19772318f605e31c"
+
+cli-truncate@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/cli-truncate/-/cli-truncate-0.2.1.tgz#9f15cfbb0705005369216c626ac7d05ab90dd574"
+  dependencies:
+    slice-ansi "0.0.4"
+    string-width "^1.0.1"
+
 cli-width@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/cli-width/-/cli-width-2.1.0.tgz#b234ca209b29ef66fc518d9b98d5847b00edf00a"
@@ -1517,13 +1554,27 @@ codecov@^1.0.1:
     request ">=2.42.0"
     urlgrey ">=0.4.0"
 
+color-convert@^1.0.0:
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-1.9.0.tgz#1accf97dd739b983bf994d56fec8f95853641b7a"
+  dependencies:
+    color-name "^1.1.1"
+
+color-name@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.1.tgz#4b1415304cf50028ea81643643bd82ea05803689"
+
+colors@>=0.6.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/colors/-/colors-1.1.2.tgz#168a4701756b6a7f51a12ce0c97bfa28c084ed63"
+
 combined-stream@^1.0.5, combined-stream@~1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.5.tgz#938370a57b4a51dea2c77c15d5c5fdf895164009"
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@2.9.0, commander@2.9.x, commander@^2.5.0, commander@^2.8.1:
+commander@2.9.0, commander@2.9.x, commander@^2.5.0, commander@^2.8.1, commander@^2.9.0:
   version "2.9.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.9.0.tgz#9c99094176e12240cb22d6c5146098400fe0f7d4"
   dependencies:
@@ -1609,6 +1660,19 @@ core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
+cosmiconfig@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-1.1.0.tgz#0dea0f9804efdfb929fbb1b188e25553ea053d37"
+  dependencies:
+    graceful-fs "^4.1.2"
+    js-yaml "^3.4.3"
+    minimist "^1.2.0"
+    object-assign "^4.0.1"
+    os-homedir "^1.0.1"
+    parse-json "^2.2.0"
+    pinkie-promise "^2.0.0"
+    require-from-string "^1.1.0"
+
 cross-spawn@^4:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-4.0.2.tgz#7b9247621c23adfdd3856004a823cbe397424d41"
@@ -1616,6 +1680,14 @@ cross-spawn@^4:
     lru-cache "^4.0.1"
     which "^1.2.9"
 
+cross-spawn@^5.0.1:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
+  dependencies:
+    lru-cache "^4.0.1"
+    shebang-command "^1.2.0"
+    which "^1.2.9"
+
 cryptiles@2.x.x:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/cryptiles/-/cryptiles-2.0.5.tgz#3bdfecdc608147c1c67202fa291e7dca59eaa3b8"
@@ -1657,6 +1729,10 @@ dashdash@^1.12.0:
   dependencies:
     assert-plus "^1.0.0"
 
+date-fns@^1.27.2:
+  version "1.28.0"
+  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-1.28.0.tgz#3b12f54b66467807bb95e5930caf7bfb4170bc1a"
+
 date-now@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"
@@ -1767,7 +1843,11 @@ dom-serializer@0, dom-serializer@~0.1.0:
     domelementtype "~1.1.1"
     entities "~1.1.1"
 
-domelementtype@1, domelementtype@~1.1.1:
+domelementtype@1:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/domelementtype/-/domelementtype-1.3.0.tgz#b17aed82e8ab59e52dd9c19b1756e0fc187204c2"
+
+domelementtype@~1.1.1:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/domelementtype/-/domelementtype-1.1.3.tgz#bd28773e2642881aec51544924299c5cd822185b"
 
@@ -1794,6 +1874,10 @@ electron-to-chromium@^1.1.0, electron-to-chromium@^1.2.5, electron-to-chromium@^
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.2.6.tgz#f38ad51d1919b06bc07275c62629db803ddca05a"
 
+elegant-spinner@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/elegant-spinner/-/elegant-spinner-1.0.1.tgz#db043521c95d7e303fd8f345bedc3349cfb0729e"
+
 entities@1.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/entities/-/entities-1.0.0.tgz#b2987aa3821347fcde642b24fdfc9e4fb712bf26"
@@ -2034,7 +2118,7 @@ estraverse@~4.1.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.1.1.tgz#f6caca728933a850ef90661d0e17982ba47111a2"
 
-esutils@^2.0.2:
+esutils@2.0.2, esutils@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
 
@@ -2051,6 +2135,18 @@ execSync@1.0.2:
   dependencies:
     temp "~0.5.1"
 
+execa@^0.6.0:
+  version "0.6.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-0.6.0.tgz#934fc9f04a9febb4d4b449d976e92cfd95ef4f6e"
+  dependencies:
+    cross-spawn "^5.0.1"
+    get-stream "^3.0.0"
+    is-stream "^1.1.0"
+    npm-run-path "^2.0.0"
+    p-finally "^1.0.0"
+    signal-exit "^3.0.0"
+    strip-eof "^1.0.0"
+
 exit-hook@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/exit-hook/-/exit-hook-1.1.1.tgz#f05ca233b48c05d54fff07765df8507e95c02ff8"
@@ -2089,7 +2185,7 @@ fast-levenshtein@~2.0.4:
   version "2.0.6"
   resolved "https://registry.yarnpkg.com/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz#3d8a5c66883a16a30ca8643e851f19baa7797917"
 
-figures@^1.3.5:
+figures@^1.3.5, figures@^1.7.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/figures/-/figures-1.7.0.tgz#cbe1e3affcf1cd44b80cadfed28dc793a9701d2e"
   dependencies:
@@ -2125,6 +2221,10 @@ find-cache-dir@^0.1.1:
     mkdirp "^0.5.1"
     pkg-dir "^1.0.0"
 
+find-parent-dir@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/find-parent-dir/-/find-parent-dir-0.3.0.tgz#33c44b429ab2b2f0646299c5f9f718f376ff8d54"
+
 find-up@^1.0.0, find-up@^1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/find-up/-/find-up-1.1.2.tgz#6b2e9822b1a2ce0a60ab64d610eccad53cb24d0f"
@@ -2141,6 +2241,14 @@ flat-cache@^1.2.1:
     graceful-fs "^4.1.2"
     write "^0.2.1"
 
+flow-parser@0.40.0:
+  version "0.40.0"
+  resolved "https://registry.yarnpkg.com/flow-parser/-/flow-parser-0.40.0.tgz#b3444742189093323c4319c4fe9d35391f46bcbc"
+  dependencies:
+    ast-types "0.8.18"
+    colors ">=0.6.2"
+    minimist ">=0.2.0"
+
 for-in@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
@@ -2244,6 +2352,14 @@ get-caller-file@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-1.0.2.tgz#f702e63127e7e231c160a80c1554acb70d5047e5"
 
+get-stdin@5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-5.0.1.tgz#122e161591e21ff4c52530305693f20e6393a398"
+
+get-stream@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-3.0.0.tgz#8e943d1358dc37555054ecbe2edb05aa174ede14"
+
 getpass@^0.1.1:
   version "0.1.6"
   resolved "https://registry.yarnpkg.com/getpass/-/getpass-0.1.6.tgz#283ffd9fc1256840875311c1b60e8c40187110e6"
@@ -2284,7 +2400,7 @@ glob@7.0.5:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.0.6, glob@^7.1.1:
+glob@7.1.1, glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.0.6, glob@^7.1.1:
   version "7.1.1"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.1.tgz#805211df04faaf1c63a3600306cdf5ade50b2ec8"
   dependencies:
@@ -2413,6 +2529,15 @@ http-signature@~1.1.0:
     jsprim "^1.2.2"
     sshpk "^1.7.0"
 
+husky@^0.13.2:
+  version "0.13.2"
+  resolved "https://registry.yarnpkg.com/husky/-/husky-0.13.2.tgz#9dcf212f88e61dba36f17be1a202ed61ff6c0661"
+  dependencies:
+    chalk "^1.1.3"
+    find-parent-dir "^0.3.0"
+    is-ci "^1.0.9"
+    normalize-path "^1.0.0"
+
 iconv-lite@^0.4.5:
   version "0.4.15"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.15.tgz#fe265a218ac6a57cfe854927e9d04c19825eddeb"
@@ -2425,6 +2550,16 @@ imurmurhash@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"
 
+indent-string@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/indent-string/-/indent-string-2.1.0.tgz#8e2d48348742121b4a8218b7a137e9a52049dc80"
+  dependencies:
+    repeating "^2.0.0"
+
+indent-string@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/indent-string/-/indent-string-3.1.0.tgz#08ff4334603388399b329e6b9538dc7a3cf5de7d"
+
 inflight@^1.0.4:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
@@ -2496,6 +2631,12 @@ is-callable@^1.1.1, is-callable@^1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.3.tgz#86eb75392805ddc33af71c92a0eedf74ee7604b2"
 
+is-ci@^1.0.9:
+  version "1.0.10"
+  resolved "https://registry.yarnpkg.com/is-ci/-/is-ci-1.0.10.tgz#f739336b2632365061a9d48270cd56ae3369318e"
+  dependencies:
+    ci-info "^1.0.0"
+
 is-date-object@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.1.tgz#9aa20eb6aeebbff77fbd33e74ca01b33581d3a16"
@@ -2579,6 +2720,10 @@ is-primitive@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/is-primitive/-/is-primitive-2.0.0.tgz#207bab91638499c07b2adf240a41a87210034575"
 
+is-promise@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/is-promise/-/is-promise-2.1.0.tgz#79a2a9ece7f096e80f36d2b2f3bc16c1ff4bf3fa"
+
 is-property@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-property/-/is-property-1.0.2.tgz#57fe1c4e48474edd65b09911f26b1cd4095dda84"
@@ -2595,6 +2740,10 @@ is-resolvable@^1.0.0:
   dependencies:
     tryit "^1.0.1"
 
+is-stream@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
+
 is-symbol@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-symbol/-/is-symbol-1.0.1.tgz#3cc59f00025194b6ab2e38dbae6689256b660572"
@@ -2677,6 +2826,22 @@ istanbul-reports@^1.0.0:
   dependencies:
     handlebars "^4.0.3"
 
+jest-matcher-utils@^19.0.0:
+  version "19.0.0"
+  resolved "https://registry.yarnpkg.com/jest-matcher-utils/-/jest-matcher-utils-19.0.0.tgz#5ecd9b63565d2b001f61fbf7ec4c7f537964564d"
+  dependencies:
+    chalk "^1.1.3"
+    pretty-format "^19.0.0"
+
+jest-validate@19.0.0:
+  version "19.0.0"
+  resolved "https://registry.yarnpkg.com/jest-validate/-/jest-validate-19.0.0.tgz#8c6318a20ecfeaba0ba5378bfbb8277abded4173"
+  dependencies:
+    chalk "^1.1.1"
+    jest-matcher-utils "^19.0.0"
+    leven "^2.0.0"
+    pretty-format "^19.0.0"
+
 jodid25519@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/jodid25519/-/jodid25519-1.0.2.tgz#06d4912255093419477d425633606e0e90782967"
@@ -2687,7 +2852,7 @@ js-tokens@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.1.tgz#08e9f132484a2c45a30907e9dc4d5567b7f114d7"
 
-js-yaml@^3.5.1:
+js-yaml@^3.4.3, js-yaml@^3.5.1:
   version "3.8.2"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.8.2.tgz#02d3e2c0f6beab20248d412c352203827d786721"
   dependencies:
@@ -2813,6 +2978,10 @@ lcid@^1.0.0:
   dependencies:
     invert-kv "^1.0.0"
 
+leven@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/leven/-/leven-2.1.0.tgz#c2e7a9f772094dee9d34202ae8acce4687875580"
+
 levn@^0.3.0, levn@~0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/levn/-/levn-0.3.0.tgz#3b09924edf9f083c0490fdd4c0bc4421e04764ee"
@@ -2820,6 +2989,65 @@ levn@^0.3.0, levn@~0.3.0:
     prelude-ls "~1.1.2"
     type-check "~0.3.2"
 
+lint-staged@^3.3.1:
+  version "3.3.1"
+  resolved "https://registry.yarnpkg.com/lint-staged/-/lint-staged-3.3.1.tgz#b725d98a2be1f82cb228069fab682f503c95234d"
+  dependencies:
+    app-root-path "^2.0.0"
+    cosmiconfig "^1.1.0"
+    execa "^0.6.0"
+    listr "^0.11.0"
+    minimatch "^3.0.0"
+    npm-which "^3.0.1"
+    staged-git-files "0.0.4"
+    which "^1.2.11"
+
+listr-silent-renderer@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/listr-silent-renderer/-/listr-silent-renderer-1.1.1.tgz#924b5a3757153770bf1a8e3fbf74b8bbf3f9242e"
+
+listr-update-renderer@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/listr-update-renderer/-/listr-update-renderer-0.2.0.tgz#ca80e1779b4e70266807e8eed1ad6abe398550f9"
+  dependencies:
+    chalk "^1.1.3"
+    cli-truncate "^0.2.1"
+    elegant-spinner "^1.0.1"
+    figures "^1.7.0"
+    indent-string "^3.0.0"
+    log-symbols "^1.0.2"
+    log-update "^1.0.2"
+    strip-ansi "^3.0.1"
+
+listr-verbose-renderer@^0.4.0:
+  version "0.4.0"
+  resolved "https://registry.yarnpkg.com/listr-verbose-renderer/-/listr-verbose-renderer-0.4.0.tgz#44dc01bb0c34a03c572154d4d08cde9b1dc5620f"
+  dependencies:
+    chalk "^1.1.3"
+    cli-cursor "^1.0.2"
+    date-fns "^1.27.2"
+    figures "^1.7.0"
+
+listr@^0.11.0:
+  version "0.11.0"
+  resolved "https://registry.yarnpkg.com/listr/-/listr-0.11.0.tgz#5e778bc23806ac3ab984ed75564458151f39b03e"
+  dependencies:
+    chalk "^1.1.3"
+    cli-truncate "^0.2.1"
+    figures "^1.7.0"
+    indent-string "^2.1.0"
+    is-promise "^2.1.0"
+    is-stream "^1.1.0"
+    listr-silent-renderer "^1.1.1"
+    listr-update-renderer "^0.2.0"
+    listr-verbose-renderer "^0.4.0"
+    log-symbols "^1.0.2"
+    log-update "^1.0.2"
+    ora "^0.2.3"
+    rxjs "^5.0.0-beta.11"
+    stream-to-observable "^0.1.0"
+    strip-ansi "^3.0.1"
+
 load-json-file@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-1.1.0.tgz#956905708d58b4bab4c2261b04f59f31c99374c0"
@@ -2889,6 +3117,19 @@ lodash@^4.0.0, lodash@^4.1.0, lodash@^4.15.0, lodash@^4.17.4, lodash@^4.2.0, lod
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
 
+log-symbols@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/log-symbols/-/log-symbols-1.0.2.tgz#376ff7b58ea3086a0f09facc74617eca501e1a18"
+  dependencies:
+    chalk "^1.0.0"
+
+log-update@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/log-update/-/log-update-1.0.2.tgz#19929f64c4093d2d2e7075a1dad8af59c296b8d1"
+  dependencies:
+    ansi-escapes "^1.0.0"
+    cli-cursor "^1.0.2"
+
 longest@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/longest/-/longest-1.0.1.tgz#30a0b2da38f73770e8294a0d22e6625ed77d0097"
@@ -2960,7 +3201,7 @@ minimist@0.0.8, minimist@~0.0.1:
   version "0.0.8"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
 
-minimist@^1.2.0:
+minimist@1.2.0, minimist@>=0.2.0, minimist@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
 
@@ -3035,10 +3276,34 @@ normalize-package-data@^2.3.2:
     semver "2 || 3 || 4 || 5"
     validate-npm-package-license "^3.0.1"
 
+normalize-path@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-1.0.0.tgz#32d0e472f91ff345701c15a8311018d3b0a90379"
+
 normalize-path@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-2.0.1.tgz#47886ac1662760d4261b7d979d241709d3ce3f7a"
 
+npm-path@^2.0.2:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/npm-path/-/npm-path-2.0.3.tgz#15cff4e1c89a38da77f56f6055b24f975dfb2bbe"
+  dependencies:
+    which "^1.2.10"
+
+npm-run-path@^2.0.0:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/npm-run-path/-/npm-run-path-2.0.2.tgz#35a9232dfa35d7067b4cb2ddf2357b1871536c5f"
+  dependencies:
+    path-key "^2.0.0"
+
+npm-which@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/npm-which/-/npm-which-3.0.1.tgz#9225f26ec3a285c209cae67c3b11a6b4ab7140aa"
+  dependencies:
+    commander "^2.9.0"
+    npm-path "^2.0.2"
+    which "^1.2.10"
+
 npmlog@^4.0.1:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/npmlog/-/npmlog-4.0.2.tgz#d03950e0e78ce1527ba26d2a7592e9348ac3e75f"
@@ -3184,6 +3449,15 @@ optionator@^0.8.1, optionator@^0.8.2:
     type-check "~0.3.2"
     wordwrap "~1.0.0"
 
+ora@^0.2.3:
+  version "0.2.3"
+  resolved "https://registry.yarnpkg.com/ora/-/ora-0.2.3.tgz#37527d220adcd53c39b73571d754156d5db657a4"
+  dependencies:
+    chalk "^1.1.1"
+    cli-cursor "^1.0.2"
+    cli-spinners "^0.1.2"
+    object-assign "^4.0.1"
+
 os-homedir@^1.0.0, os-homedir@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
@@ -3206,6 +3480,10 @@ output-file-sync@^1.1.0:
     mkdirp "^0.5.1"
     object-assign "^4.1.0"
 
+p-finally@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
+
 parse-glob@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/parse-glob/-/parse-glob-3.0.4.tgz#b2c376cfb11f35513badd173ef0bb6e3a388391c"
@@ -3239,6 +3517,10 @@ path-is-inside@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/path-is-inside/-/path-is-inside-1.0.2.tgz#365417dede44430d1c11af61027facf074bdfc53"
 
+path-key@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/path-key/-/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
+
 path-parse@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.5.tgz#3c1adf871ea9cd6c9431b6ea2bd74a0ff055c4c1"
@@ -3287,6 +3569,27 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
+prettier@^0.22.0:
+  version "0.22.0"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-0.22.0.tgz#7b37c4480d0858180407e5a8e13f0f47da7385d2"
+  dependencies:
+    ast-types "0.9.4"
+    babel-code-frame "6.22.0"
+    babylon "6.15.0"
+    chalk "1.1.3"
+    esutils "2.0.2"
+    flow-parser "0.40.0"
+    get-stdin "5.0.1"
+    glob "7.1.1"
+    jest-validate "19.0.0"
+    minimist "1.2.0"
+
+pretty-format@^19.0.0:
+  version "19.0.0"
+  resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-19.0.0.tgz#56530d32acb98a3fa4851c4e2b9d37b420684c84"
+  dependencies:
+    ansi-styles "^3.0.0"
+
 private@^0.1.6, private@~0.1.5:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/private/-/private-0.1.7.tgz#68ce5e8a1ef0a23bb570cc28537b5332aba63ef1"
@@ -3533,6 +3836,10 @@ require-directory@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/require-directory/-/require-directory-2.1.1.tgz#8c64ad5fd30dab1c976e2344ffe7f792a6a6df42"
 
+require-from-string@^1.1.0:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/require-from-string/-/require-from-string-1.2.1.tgz#529c9ccef27380adfec9a2f965b649bbee636418"
+
 require-main-filename@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/require-main-filename/-/require-main-filename-1.0.1.tgz#97f717b69d48784f5f526a6c5aa8ffdda055a4d1"
@@ -3603,6 +3910,12 @@ rx-lite@^3.1.2:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/rx-lite/-/rx-lite-3.1.2.tgz#19ce502ca572665f3b647b10939f97fd1615f102"
 
+rxjs@^5.0.0-beta.11:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-5.2.0.tgz#db537de8767c05fa73721587a29e0085307d318b"
+  dependencies:
+    symbol-observable "^1.0.1"
+
 safe-buffer@^5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.0.1.tgz#d263ca54696cd8a306b5ca6551e92de57918fbe7"
@@ -3627,6 +3940,16 @@ set-immediate-shim@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/set-immediate-shim/-/set-immediate-shim-1.0.1.tgz#4b2b1b27eb808a9f8dcc481a58e5e56f599f3f61"
 
+shebang-command@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/shebang-command/-/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"
+  dependencies:
+    shebang-regex "^1.0.0"
+
+shebang-regex@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
+
 shelljs@0.3.x:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.3.0.tgz#3596e6307a781544f591f37da618360f31db57b1"
@@ -3751,6 +4074,14 @@ sshpk@^1.7.0:
     jsbn "~0.1.0"
     tweetnacl "~0.14.0"
 
+staged-git-files@0.0.4:
+  version "0.0.4"
+  resolved "https://registry.yarnpkg.com/staged-git-files/-/staged-git-files-0.0.4.tgz#d797e1b551ca7a639dec0237dc6eb4bb9be17d35"
+
+stream-to-observable@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/stream-to-observable/-/stream-to-observable-0.1.0.tgz#45bf1d9f2d7dc09bed81f1c307c430e68b84cffe"
+
 string-alter@latest:
   version "0.7.3"
   resolved "https://registry.yarnpkg.com/string-alter/-/string-alter-0.7.3.tgz#a99f203d7293396348b49fc723dd7ab0a0b8d892"
@@ -3840,6 +4171,10 @@ strip-bom@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/strip-bom/-/strip-bom-3.0.0.tgz#2334c18e9c759f7bdd56fdef7e9ae3d588e68ed3"
 
+strip-eof@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/strip-eof/-/strip-eof-1.0.0.tgz#bb43ff5598a6eb05d89b59fcd129c983313606bf"
+
 strip-json-comments@1.0.x:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-1.0.4.tgz#1e15fbcac97d3ee99bf2d73b4c656b082bbafb91"
@@ -3858,6 +4193,10 @@ supports-color@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
 
+symbol-observable@^1.0.1:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/symbol-observable/-/symbol-observable-1.0.4.tgz#29bf615d4aa7121bdd898b22d4b3f9bc4e2aa03d"
+
 "symbol-tree@>= 3.1.0 < 4.0.0":
   version "3.2.2"
   resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.2.tgz#ae27db38f660a7ae2e1c3b7d1bc290819b8519e6"
@@ -4082,7 +4421,7 @@ which-module@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-1.0.0.tgz#bba63ca861948994ff307736089e3b96026c2a4f"
 
-which@^1.2.4, which@^1.2.9:
+which@^1.2.10, which@^1.2.11, which@^1.2.4, which@^1.2.9:
   version "1.2.12"
   resolved "https://registry.yarnpkg.com/which/-/which-1.2.12.tgz#de67b5e450269f194909ef23ece4ebe416fa1192"
   dependencies:
@@ -4098,14 +4437,10 @@ window-size@0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/window-size/-/window-size-0.1.0.tgz#5438cd2ea93b202efa3a19fe8887aee7c94f9c9d"
 
-wordwrap@0.0.2:
+wordwrap@0.0.2, wordwrap@~0.0.2:
   version "0.0.2"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.2.tgz#b79669bb42ecb409f83d583cad52ca17eaa1643f"
 
-wordwrap@~0.0.2:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
-
 wordwrap@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"