Add plexus 13 parent

Author: gnodet

pom.xml

@@ -1,6 +1,12 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
+  <parent>
+    <groupId>org.codehaus.plexus</groupId>
+    <artifactId>plexus</artifactId>
+    <version>13</version>
+  </parent>
+
   <groupId>org.codehaus.modello</groupId>
   <artifactId>modello</artifactId>
   <version>2.1.2-SNAPSHOT</version>