react-dom@15.4.0 untested ⚠️ (#874)

* chore(package): update react-dom to version 15.4.0

https://greenkeeper.io/

* chore(package): update react and test utils

Author: greenkeeperio-bot

package.json

@@ -96,12 +96,12 @@
     "node-sass": "^3.12.5",
     "phantomjs-prebuilt": "^2.1.7",
     "raw-loader": "^0.5.1",
-    "react": "^15.3.1",
+    "react": "^15.4.0",
     "react-ace": "^3.7.0",
-    "react-addons-test-utils": "^15.3.1",
+    "react-addons-test-utils": "^15.4.0",
     "react-docgen": "^2.12.0",
     "react-document-title": "^2.0.2",
-    "react-dom": "^15.3.1",
+    "react-dom": "^15.4.0",
     "react-hot-loader": "^1.3.0",
     "react-router": "^3.0.0",
     "require-dir": "^0.3.0",