Merge branch 'master' into greenkeeper/react-16.0.0

Author: akikoo

package.json

@@ -21,8 +21,8 @@
     "babel-preset-es2015": "^6.16.0",
     "babel-preset-react": "^6.16.0",
     "jsdom": "^11.0.0",
-    "mocha": "^3.4.0",
-    "sinon": "^3.0.0",
+    "mocha": "^4.0.0",
+    "sinon": "^4.0.0",
     "unexpected": "^10.18.0",
     "unexpected-sinon": "^10.1.1"
   }