message: Upgrade babel-polyfill devDependency
diff: "babel-plugin-transform-flow-strip-types": "^6.22.0",
  "babel-plugin-transform-object-rest-spread": "^6.23.0",
  "babel-plugin-transform-regenerator": "^6.24.1",
  - "babel-polyfill": "^6.16.0",
  + "babel-polyfill": "^6.23.0",
  "babel-preset-es2015": "^6.24.1",
  "eslint": "^4.1.1",
  "eslint-config-airbnb": "^15.0.1",
  