Twemoji 15 Update

Hey there,

It'd be great to update to Twemoji 15 using [jdecked](https://github.com/jdecked)'s (original designer) [fork](https://github.com/jdecked/twemoji/releases/tag/v15.0.2), considering the [original repo](https://github.com/twitter/twemoji) has been abandoned due to the *"instability"* over at Twitter.

Thanks,
Elliott