title: Filestack not limiting maximum file size for third party providers
body: <p>I'm currently using Filestack V3, and the code snippet below gives a normal alert when a file larger than 2MB is uploaded from the local file system. However there is no error message when uploading from Google Drive for example. </p>
  
  <pre><code>fileStackClient.pick({
    accept: 'image/*',
    maxSize: 2097152, //Should limit to 2MB
    fromSources: ['local_file_system','facebook','googledrive','url','imagesearch', 'instagram'],
    storeTo: [...],
  }).then(function() {
  
  });  
  </code></pre>
  
  <p>So it's basically very easy for  someone to break my site by uploading a 100MB image from google drive for example. Can you please fix? </p>