Bump org.bstats:bstats-bukkit from 3.0.3 to 3.1.0 (#120)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

spigot/placeholder-leaderboard/pom.xml

@@ -136,7 +136,7 @@
         <dependency>
             <groupId>org.bstats</groupId>
             <artifactId>bstats-bukkit</artifactId>
-            <version>3.0.3</version>
+            <version>3.1.0</version>
             <scope>compile</scope>
         </dependency>