title: Error: Invalid version: "1.0" in node.js packge.json file
body: <p>I created a very basic <code>package.json</code> and running <code>npm install</code> is throwing version error.</p>
  
  <p><strong>Erroneous package.json</strong></p>
  
  <pre><code>{
      "name": "appone",
      "description": "First CNP app",
      "version": "1.0",
      "dependencies": {
          "express": "3.x"
      }
  }
  </code></pre>
  
  <p>However on changing the version from <code>1.0</code> to <code>0.0.1</code> it is working correctly.</p>
  
  <p>I am new to node so I thought this version refers to the app version so I can give this any number. Please let me know what actually it is referring to and about the error.</p>