title: Does package.json "latest" versions include beta?
body: <p>In <code>package.json</code> you can specify a package to be synced with the latest version:</p>
  
  <pre><code>{
     ...,
     "devDependencies": {
        "gulp": "latest",
        ...
     },
     ...
  }
  </code></pre>
  
  <p>Does "latest" include the alpha or beta versions, or just the latest stable version?  I couldn't find definitive documentation on this.</p>