title: Given node.js version, programmatically determine which npm versions are compatible
body: <p>I have two questions, that are similar:</p>
  
  <ol>
  <li><p>Given a node.js version, is it possible to programmatically determine which npm versions are compatible with it?</p></li>
  <li><p>Given an npm version, is it possible to programmatically determine which node.js versions are compatible with it?</p></li>
  </ol>
  
  <p>Anyone know which if either is possible?</p>