Merge pull request #665 from graphql/greenkeeper/eslint-plugin-flowtype-2.30.0

Update eslint-plugin-flowtype to the latest version 🚀

Author: robzhu

package.json

@@ -68,7 +68,7 @@
     "coveralls": "2.11.15",
     "eslint": "3.13.1",
     "eslint-plugin-babel": "4.0.0",
-    "eslint-plugin-flowtype": "2.29.2",
+    "eslint-plugin-flowtype": "2.30.0",
     "flow-bin": "0.37.4",
     "isparta": "4.0.0",
     "mocha": "3.2.0",