upgrade parent POM to 9, swith to 9.0-SNAPSHOT

Author: hboutemy

pom.xml

@@ -5,12 +5,12 @@
   <parent>
     <groupId>org.codehaus.plexus</groupId>
     <artifactId>plexus</artifactId>
-    <version>8</version>
+    <version>9</version>
     <relativePath>../pom/pom.xml</relativePath>
   </parent>
 
   <artifactId>plexus-components</artifactId>
-  <version>6.7-SNAPSHOT</version>
+  <version>9.0-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>Plexus Components</name>