Slow as molasses 

I didn't look into how you're doing this, but `crayon(n)('some string')` is massively slow.

Essentially all you need to do is `"\x1b[38;5;" + n + "m" + "some string"` .. so some perf is in order.

Swapping out your lib for a simple custom function that did that resulted in what looked like a 100x boost.
