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:
9a793cce Remove no longer applicable caveats to setPlayerListName
7137829e SPIGOT-4496: Undeprecate MapView.getId and make int
de33ade0 Remove some draft API designations
a35fa838 SPIGOT-4472: Add Consumer scheduler methods
CraftBukkit Changes:
8cd538e6 SPIGOT-4498: Crash on startup
b4ee04ba SPIGOT-4496: Undeprecate MapView.getId and make int
ec937d0e SPIGOT-4472: Add Consumer scheduler methods
Spigot Changes:
a1f2566f Use monotonic time for watchdog
bc4adcbf SPIGOT-4498: Crash on startup
bb387e6c Rebuild patches
While Velocity supports BungeeCord-style IP forwarding, it is not secure. Users
have a lot of problems setting up firewalls or setting up plugins like IPWhitelist.
Further, the BungeeCord IP forwarding protocol still retains essentially its original
form, when there is brand new support for custom login plugin messages in 1.13.
Velocity's modern IP forwarding uses an HMAC-SHA256 code to ensure authenticity
of messages, is packed into a binary format that is smaller than BungeeCord's
forwarding, and is integrated into the Minecraft login process by using the 1.13
login plugin message packet.
improved the water code so that immunity wont trigger if the entity
has the water pathfinder system active, so this improves support
for all entities that know how to behave in water.
Merged 2 EAR patches together, and removed an MCUtil method that
doesnt have a purpose anymore
