5.15.0+1.16.5

Depending on the size of this release, there may be a human-readable changelog available on the wiki page.

Changes since 5.14.0+1.16.5

• Mark mixin as client-only - embeddedt
• Work around NPEs from early queries to ModelManager - embeddedt
• Mitigate excessive resource usage from Night Config - embeddedt
• Fix "Illegal prefix" error in log when custom class/resource locators are in use - embeddedt
• Retrieve block name once per state - embeddedt
• Speed up ModelBakeEventHelper constructor - embeddedt
• Move stalled async chunk load detection to its own config - embeddedt
• Disable the testmod by default - embeddedt
• Disable pose stack bugfix when OptiFine is installed - embeddedt
• Make the block model cache thread-local instead of using a lock - embeddedt