Update POM to use 1.1-R6 Bukkit

pom.xml

@@ -117,7 +117,7 @@
         <dependency>
             <groupId>org.bukkit</groupId>
             <artifactId>bukkit</artifactId>
-            <version>1.1-R5-SNAPSHOT</version>
+            <version>1.1-R6-SNAPSHOT</version>
             <type>jar</type>
             <scope>compile</scope>
         </dependency>