Update Twemoji to v16.0.1

[himanshupathak95]

Trac ticket: https://core.trac.wordpress.org/ticket/63324

This PR updates the Twemoji library from v15.1.0 to v16.0.1, adding support for Emoji 16.0.

[github-actions]

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[github-actions]

A commit was made that fixes the Trac ticket referenced in the description of this pull request.

SVN changeset: 60227
GitHub commit: 20e3fdd

This PR will be closed, but please confirm the accuracy of this and reopen if there is more work to be done.