Merge pull request #14 from the-road-to-react-with-firebase/greenkeeper/react-scripts-3.0.0

Update react-scripts to the latest version 🚀

Author: rwieruch

package.json

@@ -7,7 +7,7 @@
     "react": "^16.6.3",
     "react-dom": "^16.6.3",
     "react-router-dom": "^4.3.1",
-    "react-scripts": "2.1.1",
+    "react-scripts": "3.0.0",
     "recompose": "^0.30.0"
   },
   "scripts": {