[MPOM-93] Upgrade maven-gpg-plugin to 1.6

git-svn-id: https://svn.apache.org/repos/asf/maven/pom/trunk@1711658 13f79535-47bb-0310-9956-ffa450edef68
1 file changed
tree: 657b6ada0f141cbdd7d7725f5f85a2ac55fb8acc
  1. asf/
  2. maven/