Correct version number

Author: Edmundo Alvarez

pom.xml

@@ -14,7 +14,7 @@
 
     <groupId>org.graylog.plugins</groupId>
     <artifactId>usage-statistics</artifactId>
-    <version>2.1.3-SNAPSHOT</version>
+    <version>2.1.2-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <name>Graylog Usage Statistics Plugin</name>