update parent pom to 6.5

Author: hboutemy

pom.xml

@@ -20,7 +20,7 @@ limitations under the License.
   <parent>
     <artifactId>plexus-components</artifactId>
     <groupId>org.codehaus.plexus</groupId>
-    <version>6.1</version>
+    <version>6.5</version>
   </parent>
 
   <artifactId>plexus-velocity</artifactId>