chore(package): update eslint-plugin-flowtype to version 2.11.4 (#173)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -57,7 +57,7 @@
     "babel-eslint": "6.1.2",
     "eslint": "3.3.1",
     "eslint-plugin-babel": "3.3.0",
-    "eslint-plugin-flowtype": "2.11.1",
+    "eslint-plugin-flowtype": "2.11.4",
     "eslint-plugin-react": "6.1.2",
     "flow-bin": "0.29.0"
   }