Polyfill ES6/ES7 functions
Polyfill ES6/ES7 functions

I'm getting pretty tired of random crashes due to people forgetting
that array.includes, string.startsWith etc don't exist on client.

It's not like they're hard to polyfill...

sirDonovan/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client,sirDonovan/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client,sirDonovan/Pokemon-Showdown-Client,sirDonovan/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client,Zarel/Pokemon-Showdown-Client