use last 3.1 version

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1357120 13f79535-47bb-0310-9956-ffa450edef68
1 file changed
tree: fe91b267f5de79a3def06662c3a484b88a82102b
  1. src/
  2. pom.xml