Upgrade to Twemoji 12.0

[superpoincare]

Twemoji 12 has released: ​https://github.com/twitter/twemoji

and has new emoji from Emoji 12 released last month.

There's also a confirmed bug #46404 which needs to be fixed.

Also may I suggest loading the file wp-emoji-release.min.js using preload+async (one of the options suggested here: ​https://twitter.com/addyosmani/status/1098122582472212481)? I have noticed that browsers sometimes stall scripts with a defer tag and delay it much.

[desrosj]

Thanks @superpoincare! I’m moving this into the 5.2 milestone for visibility and marking it as a task. I’ll let @pento determine if he’s comfortable upgrading this during the beta period since he is the component maintainer.

[pento]

Yah, we can do this.

For the stalling issue, this may be because defer is ​not obeyed in Chrome when the page is served as XHTML.

[pento]

In 45134:

Emoji: Update Twemoji to version 12.0.0.

Props pento, superpoincare.
Fixes #46404, #46805.

[earnjam]

Was compiling some last minute dev notes and noticed that they released a version 12.0.1 two days ago with some additional emojis that were missed in 12.0.0.

​https://github.com/twitter/twemoji/releases/tag/v12.0.1

@pento Do we want to try to get that in before the RC later today?

[pento]

In 45240:

Emoji: Upgrade Twemoji to 12.0.1.

As this point release doesn't modify any images, only adding a few missing ones, we don't need to change the CDN location.

Props earnjam.
Fixes #46805.