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:
565a5727 #533: Add consumed item, hand and consumeItem boolean to EntityShootBowEvent
CraftBukkit Changes:
927200a9#718: Add consumed item, hand and consumeItem boolean to EntityShootBowEvent