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:
d264e972 #591: Add option for a consumer before spawning an item
1c537fce #590: Add spawn and transform reasons for piglin zombification.
CraftBukkit Changes:
ee5006d1 #810: Add option for a consumer before spawning an item
f6a39d3c #809: Add spawn and transform reasons for piglin zombification.
0c24068a Organise imports
Spigot Changes:
bff52619 Organise imports
