Build: use lerna 2.x beta (#3509)

lerna changelog

update

package.json

@@ -4,13 +4,13 @@
   "devDependencies": {
     "async": "^1.5.0",
     "babel-core": "^6.3.17",
-    "babel-plugin-transform-runtime": "^6.3.13",
     "babel-plugin-transform-class-properties": "^6.6.0",
     "babel-plugin-transform-flow-strip-types": "^6.3.13",
-    "babel-runtime": "^6.0.0",
+    "babel-plugin-transform-runtime": "^6.3.13",
     "babel-preset-es2015": "^6.6.0",
     "babel-preset-es2015-loose": "^7.0.0",
     "babel-preset-stage-0": "^6.0.0",
+    "babel-runtime": "^6.0.0",
     "browserify": "^11.2.0",
     "bundle-collapser": "^1.2.1",
     "chai": "^2.2.0",
@@ -18,7 +18,6 @@
     "codecov.io": "^0.1.6",
     "derequire": "^2.0.2",
     "es5-shim": "^4.1.7",
-    "kcheck": "^2.0.0",
     "fs-readdir-recursive": "^0.1.2",
     "gulp": "^3.9.0",
     "gulp-babel": "^6.0.0",
@@ -27,7 +26,9 @@
     "gulp-util": "^3.0.7",
     "gulp-watch": "^4.3.5",
     "istanbul": "^0.3.5",
-    "lerna": "^1.0.0",
+    "kcheck": "^2.0.0",
+    "lerna": "2.0.0-beta.23",
+    "lerna-changelog": "^0.2.0",
     "lodash": "^4.2.0",
     "matcha": "^0.6.0",
     "mkdirp": "^0.5.1",
@@ -44,7 +45,10 @@
     "uglify-js": "^2.4.16"
   },
   "babel": {
-    "presets": ["stage-0", "es2015-loose"],
+    "presets": [
+      "stage-0",
+      "es2015-loose"
+    ],
     "plugins": [
       "./scripts/add-module-exports",
       "transform-runtime",