• Bump version (modmuss50)
• Add SpecialBlockRendererRegistry (#4271) (PepperCode1)
• 1.21.4 (modmuss50)
• Update to loom 1.9 (#4260) (modmuss)
• Implement changes to client auto-test threading (#4256) (Joseph Burton)
• Make data generation .cache reproducible (#4259) (modmuss)
• Allow retrieving model loading plugins (#4269) (PepperCode1)
• Fix custom ingredient implementation (#4276) (PepperCode1)
• Fix Object Builder API classloading TexturedRenderLayers too early (#4278) (PepperCode1)