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:
78568d11 Tweak Block.getTemperature to return actual block temperature
9ad459ca SPIGOT-2151: Add support for getting simple bounding box of a block
ad28b19f Add BlockData#getAsString(boolean) to hide unspecified states
CraftBukkit Changes:
1b982fd6 Tweak Block.getTemperature to return actual block temperature
f55c8191 SPIGOT-2151: Add support for getting simple bounding box of a block
4b843638 Add BlockData#getAsString(boolean) to hide unspecified states
Spigot Changes:
573cdf2c BUILDTOOLS-425: Disable commit.gpgSign in applyPatches.sh
667bdd6b Deprecate Spigot version of Entity.isInvulnerable
Portion of diff was dropped in the mappings update commit.
Also remove the option to remove invalid statistics. The server will
automatically do this now as of... 1.13?, our option wasn't even doing anything.