Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
716b4fce Revert SnakeYAML upgrade
ca6f8942 Update to Minecraft 1.18-rc3
57e7e952 #683: Add Player#showDemoScreen
CraftBukkit Changes:
c98abfb0 Update to Minecraft 1.18-rc3
9b258501 #960: Add Player#showDemoScreen
d9542247 Produce remapped jars after bootstrap jar
99f3ddde SPIGOT-6808: Fix RegionAccessor#getBiome
Spigot Changes:
b7a4222e Update to Minecraft 1.18-rc3
Josh Roy
Nassim Jahnke