Update EmojiOne to 4.0

[wilg]

This project uses EmojiOne 2.x, but there is a 4.0 version with more up-to-date icons. It's on a different CDN though: https://cdn.jsdelivr.net/emojione/assets/4.0/png/128/1f600.png

[enzoferey]

As I answered you in the other issue, to render that emoji we would need to update the EmojiOne cdn version (if the emoji didn't exist in 2.x) and then add it to the list of aliases.

Feel free to do those changes, pretty sure @tommoor will be glad to add them :)

[tommoor]

Very happy to accept a PR – I don't think it would be too involved but I'm not currently using this library in any production projects so not top of list for me.

[enzoferey]

All right, I will work on that. I feel like it's good for the future of the library, we will be able to support much more emojis ! Expect a PR from me by the end of the week ;)