add missed version information for maven jar plugin

SubOptimal · SubOptimal · commit c4b0653e43ad · 2014-01-20T00:29:52.000+01:00
diff --git a/pom.xml b/pom.xml
@@ -54,6 +54,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
+                <version>2.2</version>
                 <configuration>
                     <archive>
                         <manifest>
