1.3.2 Hotfix 2 electric boogaloo

On the second day of Christmas, Gradle gave to me: more broken things!...

Hopefully fixed the video game from crashing on 1.20.5-1.21.1 because of “no refMaps loaded”, and hopefully fixed the video game from crashing on 1.20-1.20.4 because of a missing shadow on the mixin.

Because of this, "1.20.x" has been split into "1.20-1.20.4" & "1.20.5-1.20.6". This also helps with Java versioning problems I had.

A massive thanks to everyone who has reported issues. If you find any other issues, feel free to report it!