title: UnexpectedValueException Could not parse version constraint ^1.0.2: Invalid version string "^1.0.2"
body: <p>Composer gives the following error:</p>
  
  <pre><code>Could not load package phpspec/prophecy in http://packagist.org: [UnexpectedValueException] Could not parse version constraint ^1.0.2: Invalid version string "^1.0.2"  
  </code></pre>