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:
bf1fa3e3 Update to Minecraft 1.15.1

CraftBukkit Changes:
30a1b691 Update to Minecraft 1.15.1
e2790ae2 Remove outdated build delay.

Spigot Changes:
2ee05fef Update to Minecraft 1.15.1

Spigot-API-Patches/POM-changes.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] POM changes
 
 
 diff --git a/pom.xml b/pom.xml
-index 78388c20..3617d769 100644
+index fd011758..416da4ae 100644
 --- a/pom.xml
 +++ b/pom.xml
 @@ -0,0 +0,0 @@
@@ -22,7 +22,7 @@ index 78388c20..3617d769 100644
 -    <artifactId>spigot-api</artifactId>
 +    <groupId>com.destroystokyo.paper</groupId>
 +    <artifactId>paper-api</artifactId>
-     <version>1.15-R0.1-SNAPSHOT</version>
+     <version>1.15.1-R0.1-SNAPSHOT</version>
      <packaging>jar</packaging>
  
 -    <name>Spigot-API</name>