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/0152-PreSpawnerSpawnEvent.patch

@@ -1,4 +1,4 @@
-From 57a505b782c36e3f017b9c7c31bc8187bb27a17b Mon Sep 17 00:00:00 2001
+From 40a49656a4e036c386db9681efd960a27aedf0b7 Mon Sep 17 00:00:00 2001
 From: Phoenix616 <mail@moep.tv>
 Date: Tue, 18 Sep 2018 23:50:10 +0100
 Subject: [PATCH] PreSpawnerSpawnEvent
@@ -44,5 +44,5 @@ index 000000000..48cff0635
 +    }
 +}
 -- 
-2.25.1
+2.26.2