Changes

1.21.1 Update (Updated Upstream (Paper))

Upstream has released updates that appear to apply and compile correctly

Paper Changes:
PaperMC/Paper@77a5779 Updated Upstream (Bukkit/CraftBukkit/Spigot) (#11197)
PaperMC/Paper@4d7cef3 Fix source of knockback for spigot events (#11176)
PaperMC/Paper@b1b5d4c Check shooter in configurable projectile relative velocity patch
PaperMC/Paper@83b6b26 Update to 1.21.1
PaperMC/Paper@306d0df Update generated code
PaperMC/Paper@70dfa46 Fix CraftMetaShield equality (#11232)
PaperMC/Paper@1cecc24 Fix tag key generator output inconsistencies (#11218)
PaperMC/Paper@7d7f123 Fix wrong spawn reason for trial spawners (#11229)
PaperMC/Paper@1c3c47a Correctly check enchants for ItemStack#damage (#11240)
PaperMC/Paper@1187544 Fix teleport event getTo returning null (#11239)
PaperMC/Paper@dd941cc Re-add patches for can-place/can-destroy API (#11238)
PaperMC/Paper@ab0d24a Configuration for horizontal-only item merging (#11219)
PaperMC/Paper@098bd39 Remove arbitrary book page limit (#11228)
PaperMC/Paper@f97aff7 [ci skip] Fix Effect javadocs (#11182)
PaperMC/Paper@4a97ba3 Fix `setSendViewDistance`'s return (#11247)
PaperMC/Paper@1798e94 Fix BasicCommand suggestion arg count (#11241)
PaperMC/Paper@7c9240f Improve standard messenger logging
 (commit: d75961f)