Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
CraftBukkit Changes:
43183eab SPIGOT-5399: spawn-npcs ignored during world generation
e9bb2f15 SPIGOT-5403: isSimilar returns true for different skulls
5c9e7236 SPIGOT-5409: Remove unnecessary defaulting in CraftMetaBookSigned
821238b6 SPIGOT-5412: Use SpawnReason.NATURAL for wandering traders and trader llamas
This option does not set the absolute speed of the entity as the name
implies. It sets a modifier. The default (vanilla) value of `0.5` sets
the baby zombie to move at 50% faster than the base speed.
A negative value like `-0.4` would set them to move at 40% slower.
There should be no functional changes as a result of this change, it's
just clarifying the config name.
MiniDigger
Shane Freeder
Zach Brown