Merge pull request #766 from graphql/greenkeeper/eslint-plugin-flowtype-2.30.4

Update eslint-plugin-flowtype to the latest version 🚀

Author: wincent

package.json

@@ -69,7 +69,7 @@
     "coveralls": "2.12.0",
     "eslint": "3.18.0",
     "eslint-plugin-babel": "4.1.1",
-    "eslint-plugin-flowtype": "2.30.3",
+    "eslint-plugin-flowtype": "2.30.4",
     "flow-bin": "0.42.0",
     "isparta": "4.0.0",
     "mocha": "3.2.0",