I think Brunch does this, if I recall correctly. This is an important feature because people often misunderstand that transitive dependencies aren’t supposed to be importable. See https://github.com/facebookincubator/create-react-app/issues/1714 and https://github.com/facebookincubator/create-react-app/issues/1622 for examples.
