title: Disabling xdebug when running composer
body: <p>When running <code>composer diagnose</code>, I get the following error : </p>
  
  <blockquote>
    <p>The xdebug extension is loaded, this can slow down Composer a little.
    Disabling it when using Composer is recommended.</p>
  </blockquote>
  
  <p>How can I disable xdebug only when I'm running Composer?</p>