title: QuillJS keep HTML Font Format on paste
body: <p>I'm attempting to paste some stylized font into a quillJS editor and keep the formatting. However, the formatting is removed whenever I paste it.
  I can create a clipboard matcher and have it set the font color manually, but I don't get to keep the original formatting. It's just replaced. </p>
  
  <p>Here's my codepen:
  <a href="https://codepen.io/ashinyacorn/pen/wvvRoJp?editors=0011" rel="nofollow noreferrer">https://codepen.io/ashinyacorn/pen/wvvRoJp?editors=0011</a></p>
  
  <p>And this is what I'm working with:</p>
  
  <pre><code>var Clipboard = Quill.import('modules/clipboard');
  var Delta = Quill.import('delta');
  var quill = new Quill('#editor');
  
  quill.clipboard.addMatcher('B', function(node, delta) {
    console.log('How BOLD of you');
    return delta.compose(new Delta().retain(delta.length(), { bold: true }));
  });
  
  //Keep font formatting (size, color) ? 
  quill.clipboard.addMatcher('FONT', function(node, delta) {
    console.log('HOW FONTY');
    return delta;
  });
  </code></pre>
  
  <p>I would expect that if you were to paste in something that has a font styling, it would be kept. But it isn't, unless I override the delta and manually set the color myself. Is there anyway to tell the delta what the font color and style already is? Or a way to tell the clipboard to keep the styling? </p>