Updated Upstream (Bukkit/CraftBukkit)

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:
b999860d SPIGOT-2304: Add LootGenerateEvent

CraftBukkit Changes:
77fd87e4 SPIGOT-2304: Implement LootGenerateEvent
a1a705ee SPIGOT-5566: Doused campfires & fires should call EntityChangeBlockEvent
41712edd SPIGOT-5707: PersistentDataHolder not Persistent on API dropped Item

Spigot-API-Patches/0046-PlayerTeleportEndGatewayEvent.patch

@@ -1,4 +1,4 @@
-From 0e0e72ef0da87fb3a9de37e049181261b1563ade Mon Sep 17 00:00:00 2001
+From 6142445c0581fffa4484fd3ddc164249a3736687 Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Sat, 31 Dec 2016 20:29:33 -0500
 Subject: [PATCH] PlayerTeleportEndGatewayEvent
@@ -41,5 +41,5 @@ index 000000000..b64ab6eec
 +    }
 +}
 -- 
-2.25.1
+2.26.2