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
Bukkit Changes:
e28fb3bd SPIGOT-5301: BlockIgniteEvent for campfire + arrow
CraftBukkit Changes:
763e5601 SPIGOT-5294: Cancelled EntityPickupItemEvent and PlayerPickupItemEvent alter on-ground stacks
403ac185 SPIGOT-5301: BlockIgniteEvent for campfire + arrow
Zach Brown
Shane Freeder
Omer Uddin