Summary: Specs were failing on Linux, this diff fixes them.
Test Plan: Unit tests
Reviewers: evan, juan
Reviewed By: juan
Differential Revision: https://phab.nylas.com/D3029
* Add PNGs and JSON file
* Add Apple and Twitter emoji
* Fix linter issues and tests
* Get correct path from EmojiStore
* Add emoji regex and update extensions
* Remove the scary regex
Summary: Adds tests to check that emoji popover is inserting emoji correctly and adding PNGs as expected.
Test Plan: Tested locally.
Reviewers: evan, bengotow, juan
Reviewed By: juan
Subscribers: juan
Differential Revision: https://phab.nylas.com/D2810