[MRESOURCES-123] Mark resources plugin @threadSafe

Update maven-plugins to 18, plexus-utils to 2.0.5

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@943020 13f79535-47bb-0310-9956-ffa450edef68
4 files changed
tree: cf381eb2a93371bb317f4b3cb1f65be7b156dcca
  1. src/
  2. pom.xml