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/0111-Add-EntityKnockbackByEntityEvent.patch

@@ -1,4 +1,4 @@
-From 4591321a0b6f1215bbcd8ee48963b40a0ac2a9ca Mon Sep 17 00:00:00 2001
+From 1f19271ba32e886dbad2f7395d700d65a6b3ac8f Mon Sep 17 00:00:00 2001
 From: Brokkonaut <hannos17@gmx.de>
 Date: Mon, 18 Jun 2018 15:40:39 +0200
 Subject: [PATCH] Add EntityKnockbackByEntityEvent
@@ -93,5 +93,5 @@ index 000000000..9efecabab
 +    }
 +}
 -- 
-2.25.1
+2.26.2