v1.21.11 support for Spigot/Paper
v1.21.10 support for Spigot/Paper included as well
UNOFFICIAL, you can find official builds here, check there first for an official 1.21.11 release.
If you're looking for a Fabric version, look here instead. This jar includes textures and models from this PR as well.
[v1.21.11-spigot.0] - Support for 1.21.11 Spigot
[v1.21.11-spigot.0] - Support for rendering copper chests; single chest rendering bugfix (from reusteur73)