Bump bstats-bukkit from 1.8 to 2.2.1

Bumps [bstats-bukkit](https://github.com/Bastian/bStats-Metrics) from 1.8 to 2.2.1.
- [Release notes](https://github.com/Bastian/bStats-Metrics/releases)
- [Commits](https://github.com/Bastian/bStats-Metrics/commits/v2.2.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -35,7 +35,7 @@
 		<dependency>
 			<groupId>org.bstats</groupId>
 			<artifactId>bstats-bukkit</artifactId>
-			<version>1.8</version>
+			<version>2.2.1</version>
 			<scope>compile</scope>
 		</dependency>
 	</dependencies>