This upgrade adds support for the transgender flag: 🏳️⚧️
There's some additional housekeeping in this commit:
- Twemoji recently rearranged their repository and package, so `Gruntfile.js` needed tweaking to allow for that.
- As only new files were added in this Twemoji release, the CDN version didn't need updating.
Fixes#47852.
Built from https://develop.svn.wordpress.org/trunk@45769
git-svn-id: http://core.svn.wordpress.org/trunk@45580 1a063a9b-81f0-0310-95a4-ce76da25c4cd