Merge pull request #671 from LLK/greenkeeper/react-intl-2.4.0

Update react-intl to the latest version 

package.json

@@ -69,7 +69,7 @@
     "react-contextmenu": "2.6.5",
     "react-dom": "15.6.1",
     "react-draggable": "3.0.2",
-    "react-intl": "2.3.0",
+    "react-intl": "2.4.0",
     "react-intl-redux": "0.6.0",
     "react-modal": "2.3.1",
     "react-redux": "5.0.6",