chore(package): update flow-bin to version 0.120.0

Closes #28

Author: greenkeeper[bot]

package.json

@@ -18,7 +18,7 @@
     "eslint-config-google": "^0.10.0",
     "eslint-plugin-flowtype": "^2.46.3",
     "eslint-plugin-import": "^2.11.0",
-    "flow-bin": "^0.83.0",
+    "flow-bin": "^0.120.0",
     "lerna": "^2.11.0",
     "prettier": "^1.12.1",
     "prettier-eslint": "^8.8.1"