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/0032-Add-PlayerUseUnknownEntityEvent.patch

@@ -1,4 +1,4 @@
-From 8ac6eed2974264699f48da9eafb488bc5f9504ab Mon Sep 17 00:00:00 2001
+From d54f8dbd0a40ad129a03b27a1f96d66799559f34 Mon Sep 17 00:00:00 2001
 From: Jedediah Smith <jedediah@silencegreys.com>
 Date: Sat, 2 Apr 2016 05:08:36 -0400
 Subject: [PATCH] Add PlayerUseUnknownEntityEvent
@@ -57,5 +57,5 @@ index 000000000..09cfdf48e
 +    }
 +}
 -- 
-2.25.1
+2.26.2