Merge pull request #11 from ReactTraining/greenkeeper-webpack-1.13.3

Update webpack to version 1.13.3 🚀

Author: mjackson

package.json

@@ -52,6 +52,6 @@
     "react": "^15.3.0",
     "react-dom": "^15.3.0",
     "readline-sync": "^1.4.4",
-    "webpack": "1.13.2"
+    "webpack": "1.13.3"
   }
 }