upgrade babel 7 (#105)

.babelrc

@@ -1,3 +0,0 @@
-{
-  "presets": ["./.babelrc.js"]
-}

.babelrc.js

@@ -3,5 +3,14 @@ const modules = BABEL_ENV === 'cjs' || NODE_ENV === 'test' ? 'commonjs' : false
 const loose = true
 
 module.exports = {
-  presets: [['env', { modules, loose, targets: { uglify: true } }], 'stage-2', 'react', 'flow'],
+  presets: [
+    [
+      '@babel/preset-env', {
+        modules,
+        loose
+      }
+    ],
+    '@babel/preset-react',
+    '@babel/preset-flow'
+  ],
 }

package.json

@@ -43,12 +43,16 @@
     "prepush": "npm run test"
   },
   "devDependencies": {
+    "@babel/core": "^7.1.2",
+    "@babel/polyfill": "^7.0.0",
+    "@babel/preset-env": "^7.1.0",
+    "@babel/preset-flow": "^7.0.0",
+    "@babel/preset-react": "^7.0.0",
+    "@babel/register": "^7.0.0",
+    "@babel/runtime": "^7.0.0",
     "@storybook/react": "^3.4.11",
-    "babel-core": "^6.26.3",
+    "babel-core": "^7.0.0-bridge.0",
     "babel-eslint": "^10.0.1",
-    "babel-plugin-external-helpers": "^6.22.0",
-    "babel-polyfill": "^6.26.0",
-    "babel-runtime": "^6.26.0",
     "chai": "^4.1.2",
     "chai-enzyme": "^1.0.0-beta.0",
     "cross-env": "^5.1.3",
@@ -65,10 +69,10 @@
     "prettier": "^1.6.1",
     "react": "^16.1.1",
     "react-dom": "^16.1.1",
-    "rollup": "0.53",
-    "rollup-plugin-babel": "^3.0.3",
+    "rollup": "0.66.4",
+    "rollup-plugin-babel": "^4.0.3",
     "rollup-plugin-replace": "^2.0.0",
-    "rollup-plugin-uglify": "^2.0.1"
+    "rollup-plugin-uglify": "^6.0.0"
   },
   "peerDependencies": {
     "react": "^15.0.0-0 || ^16.0.0-0"

rollup.config.js

@@ -1,14 +1,13 @@
 import babel from 'rollup-plugin-babel'
 import replace from 'rollup-plugin-replace'
-import uglify from 'rollup-plugin-uglify'
+import { uglify } from "rollup-plugin-uglify";
 import pkg from './package.json'
 
 const mergeAll = (objs) => Object.assign({}, ...objs)
 
 const commonPlugins = [
   babel({
-    exclude: 'node_modules/**',
-    plugins: ['external-helpers']
+    exclude: 'node_modules/**'
   }),
 ]
 

scripts/mocha_runner.js

@@ -23,5 +23,5 @@ global.navigator = {
 
 documentRef = document
 
-require('babel-core/register')
-require('babel-polyfill')
+require('@babel/register')
+require('@babel/polyfill')