Create-react-app: Switch back to babel-loader

[Timer]

Also change caller behavior per https://github.com/facebook/create-react-app/pull/5078#discussion_r220795153
edit: also ensure all configuration turned off

[iansu]

I'm working on this now.

[existentialism]

We released [email protected]!

[iansu]

@existentialism I think there might be a bug in this implementation: https://github.com/babel/babel-loader/commit/ac0c869b86b98881ac5544bf7248c63a971b7219#r30679414

[iansu]

I've submitted a PR to fix this check: https://github.com/babel/babel-loader/pull/692

[existentialism]

@iansu thanks!

[iansu]

I have a PR ready for this issue. Just waiting on a new version of babel-loader to be released.

[existentialism]

@iansu thanks again for the the fix, 8.0.4 is out!