Enforce Prettier defaults + also format .babelrc and .json (#7499)

* .prettierrc: full configuration for Prettier

This way, contributors using different-from-default settings will still
use the correct prettier settings

* Makefile: also lint .babelrc.js

* Makefile: also prettify .json files

* Exclude package.json files and correct build dir

* Add more default options to prettierrc and load it in cli

This avoids prettier looking up the config for each file

* Format json

* Update prettier and eslint and reformat codebase

* Remove obsolete file

* Add comment

package.json

@@ -25,11 +25,11 @@
     "browserify": "^13.1.1",
     "bundle-collapser": "^1.2.1",
     "chai": "^4.1.0",
-    "chalk": "^2.0.0",
+    "chalk": "^2.3.2",
     "charcodes": "^0.1.0",
     "derequire": "^2.0.2",
     "enhanced-resolve": "^3.0.0",
-    "eslint": "^4.5.0",
+    "eslint": "^4.18.2",
     "eslint-config-babel": "^7.0.2",
     "eslint-plugin-flowtype": "^2.20.0",
     "eslint-plugin-prettier": "^2.5.0",
@@ -52,7 +52,7 @@
     "lodash": "^4.2.0",
     "merge-stream": "^1.0.1",
     "output-file-sync": "^2.0.0",
-    "prettier": "1.10.2",
+    "prettier": "1.11.1",
     "pump": "^1.0.2",
     "rimraf": "^2.4.3",
     "rollup-plugin-babel": "^4.0.0-beta.0",