title: npm does not support Node.js v10.0.0 but older version installed
body: <p>I have looked around for a solution but nothing found.
  I have on my ubuntu the following versions of nodejs and npm:<br>
  nodejs -> 8.11.2 <br>
  npm -> 5.6.0</p>
  
  <p>When I run commands with npm I get the following warns
  <br><br>
  npm WARN npm npm does not support Node.js v10.0.0<br>
  npm WARN npm You should probably upgrade to a newer version of node as we<br>
  npm WARN npm can't make any promises that npm will work with this version.<br>
  npm WARN npm Supported releases of Node.js are the latest release of 4, 6, 7, 8, 9.<br>
  npm WARN npm You can find the latest version at <a href="https://nodejs.org/" rel="nofollow noreferrer">https://nodejs.org/</a><br></p>
  
  <p>How I can solve it?
  Thank you</p>