title: npm install not installing latest version on GitHub
body: <p>I have a module called 'sails-mongo' and I want to update it to the newest version using the following command:</p>
  
  <pre><code>npm update sails-mongo --save
  </code></pre>
  
  <p>I also tried uninstall then install again. I tried <code>sails-mongo@latest</code> and <code>sails-mongo@beta</code>.</p>
  
  <p><strong>Problem</strong>:
  The current version (<strong>master</strong>) on GitHub the package.json (<a href="https://github.com/balderdashy/sails-mongo/blob/master/package.json">https://github.com/balderdashy/sails-mongo/blob/master/package.json</a>) file has:</p>
  
  <pre><code>"dependencies": {
    "async": "~0.2.9",
    "lodash": "~2.4.1",
    "mongodb": "1.4.2",
    "waterline-errors": "~0.10.0"
  },
  </code></pre>
  
  <p>And in the one being updated</p>
  
  <pre><code>"dependencies": {
    "async": "0.2.10",
    "underscore": "1.5.2",
    "underscore.string": "2.3.3",
    "mongodb": "~1.3.23"
  },
  </code></pre>
  
  <p>The only way I get the master branch is using the command <code>npm install git+https://github.com/balderdashy/sails-mongo</code></p>
  
  <p><strong>Why doesn't <code>sails-mongo@latest</code> install the master branch?</strong></p>