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-Server-Patches/0204-Include-Log4J2-SLF4J-implementation.patch

@@ -1,14 +1,14 @@
-From 5059a539b473c09efe4b060eb59f100b935d1dba Mon Sep 17 00:00:00 2001
+From 0a0de210e103b80fd30452bb7312732d35cb96d1 Mon Sep 17 00:00:00 2001
 From: Minecrell <minecrell@minecrell.net>
 Date: Thu, 21 Sep 2017 16:33:35 +0200
 Subject: [PATCH] Include Log4J2 SLF4J implementation
 
 
 diff --git a/pom.xml b/pom.xml
-index 70966a76a..f4dcd8564 100644
+index ed6cd4416..75f98f79a 100644
 --- a/pom.xml
 +++ b/pom.xml
-@@ -62,6 +62,12 @@
+@@ -63,6 +63,12 @@
              <version>2.8.1</version>
              <scope>compile</scope>
          </dependency>
@@ -22,5 +22,5 @@ index 70966a76a..f4dcd8564 100644
              <groupId>org.apache.logging.log4j</groupId>
              <artifactId>log4j-iostreams</artifactId>
 -- 
-2.20.0
+2.20.1