message: Move `babel-polyfill` to `devDependencies`
diff: "@types/styled-components": "^4.4.0",
  "@types/styled-system": "5.1.2",
  "babel-plugin-macros": "2.8.0",
  - "babel-polyfill": "6.26.0",
  "classnames": "^2.2.5",
  "details-element-polyfill": "2.4.0",
  "jest-axe": "3.2.0",
  "babel-plugin-preval": "5.0.0",
  "babel-plugin-styled-components": "1.10.7",
  "babel-plugin-transform-replace-expressions": "0.2.0",
  + "babel-polyfill": "6.26.0",
  "cross-env": "7.0.2",
  "enzyme": "3.10.0",
  "enzyme-adapter-react-16": "1.15.1",
  