Avoid usage of babel-polyfill

[bsideup]

See https://babeljs.io/docs/usage/polyfill/

If you are looking for something that won't modify globals to be used in a tool/library, checkout the transform-runtime plugin. This means you won't be able to use the instance methods mentioned above like Array.includes.

[ukupat]

Thanks a lot! I'll deal with the failing build.