title: github API oauth with laravel/socialite: doesn't return email
body: <p>I'm trying to use Laravel Socialite extension.</p>
  
  <p>The URL it generates for github has <code>scope=user%3Aemail</code>:</p>
  
  <pre><code>https://github.com/login/oauth/authorize?client_id=111111&amp;redirect_uri=http%3A%2F%2Flocalhost%3A8880%2Fauth%2Fcallback%2Fgithub&amp;scope=user%3Aemail&amp;state=222222&amp;response_type=code
  </code></pre>
  
  <p>Then is requests <a href="https://api.github.com/user?access_token=" rel="nofollow">https://api.github.com/user?access_token=</a>$token
  And the response seems to be OK except for the email field: it's <code>null</code>. Other fields looks good: <code>login</code>, <code>id</code>, <code>avatar_url</code>, etc...</p>
  
  <p>How can I get user email?</p>