Updated Upstream (Bukkit/CraftBukkit/Spigot)

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

Developers!: You will need to clean up your work/Minecraft/1.13.2 folder
for this

Also, restore a patch that was dropped in the last upstream

Bukkit Changes:
279eeab3 Fix command description not being set
96e2bb18 Remove debug print from SyntheticEventTest

CraftBukkit Changes:
d3ed1516 Fix dangerously threaded beacons
217a293d Don't relocate joptsimple to allow --help to work.
1be05a21 Prepare for imminent Java 12 release
a49270b2 Mappings Update
5259d80c SPIGOT-4669: Fix PlayerTeleportEvent coordinates for relative teleports

Spigot Changes:
e6eb36f2 Rebuild patches

Spigot-Server-Patches/Fix-Anvil-Level-sync-to-client.patch

@@ -10,7 +10,7 @@ Was done incorrectly and is now causing level desyncs to client.
 Always send current level to the client, and instead make setWindowProperty set the level.
 
 diff --git a/src/main/java/net/minecraft/server/ContainerAnvil.java b/src/main/java/net/minecraft/server/ContainerAnvil.java
-index a6ac516147..1560dd382a 100644
+index a6ac51614..1560dd382 100644
 --- a/src/main/java/net/minecraft/server/ContainerAnvil.java
 +++ b/src/main/java/net/minecraft/server/ContainerAnvil.java
 @@ -0,0 +0,0 @@ public class ContainerAnvil extends Container {
@@ -26,7 +26,7 @@ index a6ac516147..1560dd382a 100644
  
          this.lastLevelCost = this.levelCost;
 diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
-index 35eb4279ec..b03c62bf2d 100644
+index 47e8ef2de..7a74ce26d 100644
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
 @@ -0,0 +0,0 @@ public class CraftPlayer extends CraftHumanEntity implements Player {