message: Update to latest Flow
  0.43.0 is a tiny bit smarter, so reports only 112 Flow errors.
diff: "eslint-plugin-dependencies": "2.0.0",
  "eslint-plugin-flowtype": "2.30.4",
  "eslint-plugin-prefer-object-spread": "1.1.0",
  - "flow-bin": "0.42.0",
  + "flow-bin": "0.43.0",
  "mocha": "3.2.0",
  "prettier": "^0.22.0"
  }
  