Breaks on IE 11 because of array.find method

[myleshyson]

This package breaks on IE 11 because of the array.find method. I added a polyfill to my site to make it work, but I think you can either add that to the documentation or polyfill it in the package itself.

I think for example the problem lies in snippets like this.

const validUnits = ['px', '%'];
const isValidUnit = validUnits.find(unit => unit === out.unit);

I'm using version 1.3.5.