title: Can't get specific version of composer package
body: <p>I am trying to get latest version of calcinai/xero-php (just doing composer require as per their readme installs v ^1.7)</p>
  
  <p>When I run</p>
  
  <pre><code>composer require "calcinai/xero-php":"^2.0.4"
  </code></pre>
  
  <p>The incorrect version of this package is downloaded (composer logs below + vendor code being installed is not what is in master repos, currently at v2.0.4).</p>
  
  <p><a href="https://i.stack.imgur.com/YhqN7.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YhqN7.png" alt="enter image description here"></a></p>
  
  <p>How do I get v2.0.4/latest code that is on master (using composer)?</p>