use released version of plugin parent, i.e 28

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1710222 13f79535-47bb-0310-9956-ffa450edef68
1 file changed
tree: 69b0692ac12bf27b989fafc4c38b6e52c34125d5
  1. src/
  2. pom.xml