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:
8503c3c9 #621: Add HumanEntity#getItemInUse and Material#getSlipperiness
248deb09 #622: Add methods to check if item is the breed item for an entity
2ce691d8 Clarify Player#breakBlock only works for blocks in the same world
5dcdd48e SPIGOT-6514: Small Dripleaf block data is missing half property
cc9610b7 #619: Add Player#breakBlock()
862bc475 Fix bad merge of SPIGOT-6502 fix
989bb0c1 Downgrade SnakeYAML due to issues with comments parsing
1dff62ae Fix inverted visual fire docs
CraftBukkit Changes:
40caacc8 SPIGOT-6526: World entities are not populated when plugin onEnable is called
c9a92ad0 SPIGOT-6536: Marker position not set on spawn
20d3e57c #855: Add HumanEntity#getItemInUse and Material#getSlipperiness
d9c69b44 SPIGOT-6529: Fix BundleMeta#setItems
8bd43be5 SPIGOT-6535: PlayerGameModeChangeEvent event incorrectly reports old gamemode
4ece3ff3 #856: Add methods to check if item is the breed item for an entity
dd4bec5f Add additional validation to Player#breakBlock
bc835ae6 SPIGOT-6532: Fix Entity#setGlowing
384e116e Restore 1.16.5 behaviour of InventoryDragEvent being called even when a single item is 'dragged' to its own slot
b42e708c Fix new map colors rendering as transparent
cfe7fecf SPIGOT-6524: Inventory desync when InventoryClickEvent is cancelled
eeae1b19 SPIGOT-6522: ItemStack on cursor is always AIR
7490724d Fix missing PlayerEditBookEvent
06875f76 SPIGOT-6513: Placing ItemStack in Inventory causes InventoryAction.NOTHING
27835bde SPIGOT-6519: Fix end gateway teleports
4ac634ad SPIGOT-6515: "Un-waterlogging" throws UnsupportedOperationException in some cases
da425fa2 SPIGOT-6518: Anvils falling onto dripstone can sometimes crash server
50530da9 SPIGOT-6514: Small Dripleaf block data is missing half property
6fdecf20 #853: Implement Player#breakBlock()
4db9c49f SPIGOT-6510: Bukkit#createMap throws NullPointerException
89e2b127 SPIGOT-6517: Spider jockey crash on dripstone
cbf2f678 SPIGOT-6508: Rename conflicted getServer
74575d48 SPIGOT-6506: Fix crash with custom inventories
a3df386f Fix NPE with Entity.getNearbyEntities
d747f8ed Fix NPE with World.getNearbyEntities
4d2c7800 Fix second usage of worldGenSettings just in case
5182f923 SPIGOT-6504: Fix generating fresh worlds
Spigot Changes:
66f9d3c1 Rebuild patches
191e4971 Rebuild patches
a09c0bb6 Restore Spigot experience merging
Kyle Wood
Jason Penilla
MiniDigger