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/0175-Add-GS4-Query-event.patch

@@ -1,4 +1,4 @@
-From ea950c4c20b3979057656bc44eae306bbe176f42 Mon Sep 17 00:00:00 2001
+From bab6b94e2043244b38b9524d6956c460fecb79d9 Mon Sep 17 00:00:00 2001
 From: Mark Vainomaa <mikroskeem@mikroskeem.eu>
 Date: Sun, 17 Mar 2019 21:46:27 +0200
 Subject: [PATCH] Add GS4 Query event
@@ -423,5 +423,5 @@ index 000000000..77a19995f
 +    }
 +}
 -- 
-2.25.1
+2.26.2