Fix build

Author: Dan Petranek

package.json

@@ -7,18 +7,22 @@
     "url": "https://github.com/jpuri/html-to-draftjs.git"
   },
   "devDependencies": {
+    "babel-core": "^6.26.0",
+    "babel-loader": "^7.1.2",
+    "babel-preset-env": "^1.6.1",
     "babel-preset-es2015": "^6.24.1",
     "babel-preset-react": "^6.24.1",
     "babel-preset-stage-0": "^6.24.1",
     "chai": "^4.1.2",
     "draft-js": "^0.10.3",
     "draftjs-to-html": "^0.7.5",
+    "extract-text-webpack-plugin": "^3.0.1",
     "react": "^16.0.0",
     "react-dom": "^16.0.0",
     "react-draft-wysiwyg": "^1.10.12",
     "react-scripts": "1.0.14",
     "rimraf": "^2.6.2",
-    "webpack": "^3.6.0"
+    "webpack": "^3.8.1"
   },
   "peerDependencies": {
     "draft-js": "^0.9.x || ^0.10.x"