Support for unicode surrogate pairs

[sindresorhus]

https://mathiasbynens.be/notes/javascript-unicode

I've added a failing skipped test: 970e1a7

[kevva]

Would it be okay if I rewrote it to using ES2015 syntax? This is so we can iterate through them like https://github.com/chalk/slice-ansi/pull/8/files#diff-168726dbe96b3ce427e7fedce31bb0bcR50. Without for...of we'd need to introduce some looping logic that does this for us.

[sindresorhus]

Sure

[sindresorhus]

@kevva This module is now using ES2015 syntax, although I might have missed something. Interested in resolving this issue here too?

[kevva]

Oh, nice that you beat me to it :). I'll take a look at it tonight!