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/0168-Add-PlayerConnectionCloseEvent.patch

@@ -1,4 +1,4 @@
-From 7ecfaaa46164249d829fbeaf66cfe8cd701168bc Mon Sep 17 00:00:00 2001
+From f23d593720d88ce6108987504ed7b569e0fb8277 Mon Sep 17 00:00:00 2001
 From: Spottedleaf <Spottedleaf@users.noreply.github.com>
 Date: Sun, 7 Oct 2018 12:05:06 -0700
 Subject: [PATCH] Add PlayerConnectionCloseEvent
@@ -135,5 +135,5 @@ index 000000000..12c1c6fe9
 +    }
 +}
 -- 
-2.25.1
+2.26.2