title: Maven version:set does not update child modules
body: <p>After finally getting tired of maven release plugin I deceided to move on to something more simpler. </p>
  
  <p>I have a project, with a couple of modules. </p>
  
  <p>When I do </p>
  
  <pre><code>mvn versions:set -DnewVersion=1.0.2-SNAPSHOT
  </code></pre>
  
  <p>it just changes the parent and skips all child modules? </p>
  
  <p>what am I doing wrong? do I need to set another parameter as well?</p>