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: 48f0a48f928429cc71d8aa1f4339e5e94447ee11
  1. src/
  2. deploySite.sh
  3. LICENSE.txt
  4. pom.xml