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:
f6909573 SPIGOT-4935: Lore deserializes incorrectly from previous versions
dd99c5bb SPIGOT-4929: Beacon inventory getType() returns CHEST
2f4fe0962b