Update dependency org.bstats:bstats-bukkit to v3

Author: renovate[bot]

pom.xml

@@ -244,7 +244,7 @@
         <dependency>
             <groupId>org.bstats</groupId>
             <artifactId>bstats-bukkit</artifactId>
-            <version>2.2.1</version>
+            <version>3.1.0</version>
             <scope>compile</scope>
         </dependency>