Updated version to 1.6.4-R2.0 in pom.xml for RB.

By: EvilSeph <evilseph@gmail.com>

paper-server/pom.xml

@@ -4,7 +4,7 @@
   <groupId>org.bukkit</groupId>
   <artifactId>craftbukkit</artifactId>
   <packaging>jar</packaging>
-  <version>1.6.4-R1.1-SNAPSHOT</version>
+  <version>1.6.4-R2.0</version>
   <name>CraftBukkit</name>
   <url>http://www.bukkit.org</url>