Add ability to check (or retrieve) aliases in an input

[mfridman]

Awesome package, thanks.

What do you think about adding a func Contains(input string) bool or func FindAll(input string) []string functions? Exposing how Parse finds aliases.

This would allow the caller to check for existence, or find all the aliases in a given input string.

[isereb]

I was personally looking for something that would allow me to validate input to be text, numbers, punctuation, and EMOJI. It would be nice if I could get a regexp of all emojis somehow, or maybe rely on the contains method to implement something similar

[AkinAD]

@enescakir any thoughts on this?