Merge pull request #7 from zeit/greenkeeper-react-15.3.0

Update react to version 15.3.0 🚀

Author: nkzawa

package.json

@@ -34,7 +34,7 @@
     "gulp-task-listing": "1.0.1",
     "jsdom": "9.4.1",
     "lolex": "1.5.1",
-    "react": "15.2.1",
+    "react": "15.3.0",
     "react-dom": "15.2.1"
   },
   "scripts": {