Update upstream CB

Fixes GH-887

Spigot-Server-Patches/IllegalPacketEvent.patch

@@ -6,7 +6,7 @@ Subject: [PATCH] IllegalPacketEvent
 Fired for invalid data from players that represents hacking attempts
 
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index dbd9d30b9..d963abc9a 100644
+index 98a63dc0e..f82a81178 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
 @@ -0,0 +0,0 @@ import org.bukkit.inventory.CraftingInventory;

Spigot-Server-Patches/Properly-fix-item-duplication-bug.patch

@@ -19,7 +19,7 @@ index 53147c6e2..5fbb99b7e 100644
  
      @Override
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index d963abc9a..dd6cbe947 100644
+index f82a81178..1dc9ddbb5 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
 @@ -0,0 +0,0 @@ public class PlayerConnection implements PacketListenerPlayIn, ITickable {