[lib] bump emoji-regex version to 10.2.1

Summary:
bumped emoji-regex to 10.2.1. This new version updates the emoji version from 13 to 14. The import statement also changed in this new version, so needed to make the necessary changes in lib/shared/emojis.js. I bumped the version by manually changing the number in package.json in lib and ran yarn cleaninstall

Context on the import changes from 9.2 => 10.2

emoji-regex v 9.2
emoji-regex v 10.2

Test Plan: onlyEmojiRegex work as expected, and will be adding jest tests to subsequent diff to further test onlyOneEmojiRegex

Reviewers: atul, ashoat

Reviewed By: ashoat

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D6409