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/POM-Changes.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] POM Changes
 
 
 diff --git a/pom.xml b/pom.xml
-index b423d5be5..713034015 100644
+index 4304b622a..d1913a434 100644
 --- a/pom.xml
 +++ b/pom.xml
 @@ -0,0 +0,0 @@
@@ -23,7 +23,7 @@ index b423d5be5..713034015 100644
 +    <url>https://papermc.io</url>
  
      <properties>
-         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+         <skipTests>true</skipTests>
 @@ -0,0 +0,0 @@
      </properties>