I've published an official fork of Twemoji on NPM as @twemoji/api. If you're looking for the parser, that's also now @twemoji/parser. I don't know what Twitter will do with the original Twemoji, but I don't want it to die, so I'll keep it alive.

https://github.com/jdecked/twemoji
https://www.npmjs.com/package/@twemoji/api