runtime-transform helpers default

[insin]

The helpers default should probably be revisited.

These are the current defaults for runtime-transform, configured to let you use async/await:, pulling in the necessary runtime only when required:

  let runtimeTransformOptions = {
    helpers: false,
    polyfill: false,
    regenerator: true,
  }

For apps, I think it makes sense to have helpers on by default instead of duplicating them in every module.

For components/modules there probably comes a time where it's worth enabling helpers - e.g. here's the PR for enabling them in React Bootstrap: react-bootstrap/react-bootstrap#841

You also need to add babel-runtime as a dependency when enabling external helpers, so this should be added to the questions which get asked when creating a component project.

[insin]

Looks like this should wait until Babel 7: babel/babel#5442