Allows for more convenient debugging helpers

[liuxingbaoyu]

Q	A
Fixed Issues?	Fixes #1, Fixes #2
Patch: Bug Fix?
Major: Breaking Change?
Minor: New Feature?
Tests Added + Pass?	Yes
Documentation PR Link
Any Dependency Changes?
License	MIT

This shouldn't affect the published package size unless someone bundles Babel and doesn't do tree shaking. Since we used to publish lib/helpers, which even included .map files, the package size should be smaller now.

[babel-bot]

Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/59780