Updated Upstream (Bukkit/CraftBukkit/Spigot)

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:
79f6ba25 Skip tests on default builds
b85cc32f Further discourage World.regenerateChunk

CraftBukkit Changes:
7560d3b5 Skip tests on default builds
d0a9130d SPIGOT-4563: Fix regenerating chunks saved to disk already

Spigot Changes:
8173d06f Remove need for redundant second clone of repositories
8ede0393 Rebuild patches

Spigot-API-Patches/0002-Add-FastUtil-to-Bukkit.patch

@@ -1,4 +1,4 @@
-From 521b96be311beaf8b128080046c1140c3d910c61 Mon Sep 17 00:00:00 2001
+From 82f0740953bd81ddf86eff39d3bfba0aa4163cf2 Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Fri, 1 Apr 2016 00:02:47 -0400
 Subject: [PATCH] Add FastUtil to Bukkit
@@ -6,10 +6,10 @@ Subject: [PATCH] Add FastUtil to Bukkit
 Doesn't expose to plugins, just allows Paper-API to use it for optimization
 
 diff --git a/pom.xml b/pom.xml
-index 2a5846a18..b5cc156cd 100644
+index 229fe559..412a6901 100644
 --- a/pom.xml
 +++ b/pom.xml
-@@ -43,6 +43,12 @@
+@@ -44,6 +44,12 @@
      </pluginRepositories>
  
      <dependencies>
@@ -23,5 +23,5 @@ index 2a5846a18..b5cc156cd 100644
              <groupId>commons-lang</groupId>
              <artifactId>commons-lang</artifactId>
 -- 
-2.19.0
+2.20.1