Switch back to babel-loader

[Timer]

Also change caller behavior per #5078 (comment)
edit: also ensure all configuration turned off

[iansu]

I'm working on this now.

[existentialism]

We released babel-loader@8.0.3!

[iansu]

@existentialism I think there might be a bug in this implementation: babel/babel-loader@ac0c869#r30679414

[iansu]

I've submitted a PR to fix this check: babel/babel-loader#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!