You can now use emojis! The code is very similar to the icons.
Code:
[emoji=clapping-hands]
Code:
[emoji=clapping-hands twa-lg]
Code:
[emoji=clapping-hands twa-2x] [emoji=clapping-hands twa-3x] [emoji=clapping-hands twa-4x]
These are created by Twitter (Twemoji), and you can find the full list of supported emojis here:
https://emojipedia.org/twitter/
Just replace the spaces with dashes.