Add deprecation notice

Bump version, mark 1.21.1 as supported

Readme fix (#337)

Update to support FRAPI 3.4.0 (#335)

Update to Sodium 0.5.11

Fix glint rendering issue (Indigo PR port)

Add issue template

Bump version

Update to Sodium 0.5.9

Update Java version in Github Actions

Initial port to 1.21 (builds, untested)

Bump version, remove 1.20.2 as supported Minecraft version

Merge pull request #295 from PepperCode1/pr/1.20.x/main/fix-model-offset

Fix non-terrain model offset

Also allow 1.20.1 (fixes #277)