Merge pull request scratchfoundation#4751 from LLK/greenkeeper/react-intl-2.8.0

chore(package): update react-intl to version 2.8.0

Author: kchadha

package.json

@@ -90,7 +90,7 @@
     "react-dom": "16.2.0",
     "react-draggable": "3.0.5",
     "react-ga": "2.5.3",
-    "react-intl": "2.4.0",
+    "react-intl": "2.8.0",
     "react-modal": "3.6.1",
     "react-popover": "0.5.10",
     "react-redux": "5.0.7",