I understand that this will probably not happen soon, but I wanted to add a request for it anyway. Would it be possible for us to get an official 1.12 branch?

As soon as I finish writing these new features and updates for Levels 3 I will also look to update to 1.12 as well. If everything goes as planned, I'll release a 1.10.2, 1.11.2, and 1.12 version.