This definitely would need an update following:
https://github.com/discourse/discourse/pull/28277
Unfortunately, I do not have the bandwidth to update it at this time. If someone wants to give it a shot, I would be more than happy to take a look at a PR.
For now, I’m afraid I will need to mark it as broken 
Keep in mind that there is the emoji deny list site setting. It’s tedious if you want to remove tons of emoji, but it is an option.