Hello there,

My typescript compiler is babel and using babel plugin-transform-typescript. I believe changes on this #14 would effect babel loader and started get error above.

Babel clearly warned that export = can't work for them.
https://babeljs.io/docs/en/babel-plugin-transform-typescript#caveats

I'd like to make PR for it but want to ask your opinion because you've recently removed it and introduce export = style.

What do you suggest to change? I am more than happy to contribute.
(maybe pass loader as parameter and change export expression accordingly?)