For a while now I've been maintaining a fork of the-turk/flamoji in order to support our emoji picker. With Flarum 2.x rapidly approaching, this has become a bit of a hurdle to cross!
I spent some time over the weekend updating and upgrading the emoji picker. It's now available as pianotell/flarum-ext-flamoji which I think is the first public and open source Flarum extension I've published under the pianotell namespace.
As part of this work, I decided to swap the broken emoji-button (which I also had to fork) with emoji-mart and, as a result, the new picker looks a little different from the old one:

However, I hope the picker will work largely the same and as well as it did before. Please let me know if you find any bugs or issues with it!