Merge pull request graphql#146 from graphql/greenkeeper/flow-bin-0.43.0

Update flow-bin to the latest version 🚀

Author: AGS-

package.json

@@ -80,7 +80,7 @@
     "eslint": "3.19.0",
     "eslint-plugin-babel": "4.1.1",
     "eslint-plugin-flowtype": "2.30.4",
-    "flow-bin": "0.42.0",
+    "flow-bin": "0.43.0",
     "graphql": "^0.9.1",
     "jsdom": "9.12.0",
     "mocha": "3.2.0",