title: How can I update npm itself?
body: <p>I am trying to update npm itself:</p>
  <pre><code>npm uninstall npm -g
  </code></pre>
  <p>Responds with:</p>
  <pre><code>unbuild npm@2.12.1
  </code></pre>
  <p>But when I go:</p>
  <pre><code>npm --version
  </code></pre>
  <p>I get 1.4.28? How to upgrade the npm itself?</p>