Switch to preset-env (#1742)

* Switch to preset-env
Disables webpack modules by enabling babel modules to resolve #1638

* Bump babel-core to match babel preset versions

* Add uglify to targets

Author: Timer

packages/babel-preset-react-app/index.js

@@ -84,10 +84,16 @@ if (env === 'test') {
   module.exports = {
     presets: [
       // Latest stable ECMAScript features
-      [require.resolve('babel-preset-latest'), {
-        'es2015': {
-          modules: false
-        }
+      [require.resolve('babel-preset-env'), {
+        targets: {
+          // React parses on ie 9, so we should too
+          ie: 9,
+          // We currently minify with uglify
+          // Remove after https://github.com/mishoo/UglifyJS2/issues/448
+          uglify: true
+        },
+        // Disable polyfill transforms
+        useBuiltIns: false
       }],
       // JSX, Flow
       require.resolve('babel-preset-react')

packages/babel-preset-react-app/package.json

@@ -13,17 +13,16 @@
   "dependencies": {
     "babel-plugin-dynamic-import-node": "1.0.0",
     "babel-plugin-syntax-dynamic-import": "6.18.0",
-    "babel-plugin-transform-class-properties": "6.22.0",
-    "babel-plugin-transform-object-rest-spread": "6.22.0",
-    "babel-plugin-transform-react-constant-elements": "6.22.0",
-    "babel-plugin-transform-react-jsx": "6.22.0",
+    "babel-plugin-transform-class-properties": "6.23.0",
+    "babel-plugin-transform-object-rest-spread": "6.23.0",
+    "babel-plugin-transform-react-constant-elements": "6.23.0",
+    "babel-plugin-transform-react-jsx": "6.23.0",
     "babel-plugin-transform-react-jsx-self": "6.22.0",
     "babel-plugin-transform-react-jsx-source": "6.22.0",
     "babel-plugin-transform-regenerator": "6.22.0",
-    "babel-plugin-transform-runtime": "6.22.0",
-    "babel-preset-env": "1.1.8",
-    "babel-preset-latest": "6.22.0",
-    "babel-preset-react": "6.22.0",
-    "babel-runtime": "6.22.0"
+    "babel-plugin-transform-runtime": "6.23.0",
+    "babel-preset-env": "1.2.1",
+    "babel-preset-react": "6.23.0",
+    "babel-runtime": "6.23.0"
   }
 }

packages/react-scripts/package.json

@@ -24,7 +24,7 @@
   },
   "dependencies": {
     "autoprefixer": "6.7.5",
-    "babel-core": "6.22.1",
+    "babel-core": "6.23.1",
     "babel-eslint": "7.1.1",
     "babel-jest": "18.0.0",
     "babel-loader": "6.3.2",