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: 13749b1c93861bbb1e7261e082e671b21d50d2da
  1. src/
  2. pom.xml