chore(package): update flow-bin to version 0.40.0

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -66,7 +66,7 @@
     "eslint": "^3.11.1",
     "eslint-plugin-flowtype": "^2.28.2",
     "eslint-watch": "^2.1.14",
-    "flow-bin": "^0.39.0",
+    "flow-bin": "^0.40.0",
     "flow-watch": "^1.1.0",
     "immutable": "^3.8.1",
     "istanbul": "^0.4.5",