use last maven parent

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk/maven-plugins@1436395 13f79535-47bb-0310-9956-ffa450edef68

pom.xml

@@ -23,7 +23,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven-parent</artifactId>
-    <version>22</version>
+    <version>23</version>
     <relativePath>../../pom/maven/pom.xml</relativePath>
   </parent>