Act as a polyfill for Node's implementation

[Fishrock123]

Heya, it would be nice if this package name could be used as a polyfill for Node's util.callbackify() - a similar feature with a perhaps slightly more comprehensive implementation.

The implementation can be found here and the node PR with discussion here.

cc @js-n

[junosuarez]

I like this idea and would gladly either merge a PR and/or add you as an npm package owner.