title: Quill - how to use modules?
body: <p>I'd like to use some Quill modules for my own purposes, for example I'd like to use image uploader.</p>
  
  <p><a href="https://github.com/quilljs/quill/blob/9a77567fe356d384074df7479c33ceac509d9351/modules/uploader.js" rel="nofollow noreferrer">https://github.com/quilljs/quill/blob/9a77567fe356d384074df7479c33ceac509d9351/modules/uploader.js</a></p>
  
  <p>I'v got access to the quill instance after initialising it:</p>
  
  <pre><code>let quillContainerSelector = '.quill-container';
  
  let quill = new Quill(quillContainerSelector, {
    modules: {
      toolbar: toolbarOptions
    },
    theme: 'snow',
  });
  </code></pre>
  
  <p>How can I call <strong>upload</strong> function from <em>Uploader</em> module ?</p>