Feature/webpack3 (#2574)

* Add source-map-loader to support source maps of dependencies

* merge with latest develop

* add ModuleConcatenationPlugin

* revert source-map-loader

* bump to 3.1 and update dev-server

* rebase to master

* rebase again

* bump webpack

* remove ModuleConcatenationPlugin, downgraded react packages, bump etwp

* ETWP rc1 only for testing

* bump ETWP and webpack 3

* bump WP3

* revert to 3.2.0

* bump sw-precache-webpack-plugin

* bump back to 3.3.0

* bump dev-server and manifest

packages/react-scripts/package.json

@@ -39,7 +39,7 @@
     "eslint-plugin-import": "2.7.0",
     "eslint-plugin-jsx-a11y": "5.1.1",
     "eslint-plugin-react": "7.1.0",
-    "extract-text-webpack-plugin": "2.1.2",
+    "extract-text-webpack-plugin": "3.0.0",
     "file-loader": "0.11.2",
     "fs-extra": "3.0.1",
     "html-webpack-plugin": "2.29.0",
@@ -47,15 +47,15 @@
     "object-assign": "4.1.1",
     "postcss-flexbugs-fixes": "3.0.0",
     "postcss-loader": "2.0.6",
-    "promise": "7.1.1",
+    "promise": "8.0.1",
     "react-dev-utils": "^3.0.2",
     "react-error-overlay": "^1.0.9",
     "style-loader": "0.18.2",
-    "sw-precache-webpack-plugin": "0.11.3",
+    "sw-precache-webpack-plugin": "0.11.4",
     "url-loader": "0.5.9",
-    "webpack": "2.6.1",
-    "webpack-dev-server": "2.5.1",
-    "webpack-manifest-plugin": "1.1.0",
+    "webpack": "3.3.0",
+    "webpack-dev-server": "2.6.1",
+    "webpack-manifest-plugin": "1.2.1",
     "whatwg-fetch": "2.0.3"
   },
   "devDependencies": {