title: how to add more variant in matrial ui typography
body: <p>in the design I'm styling I have more then style for the Heading</p>
  
  <ol>
  <li>h1 with Serif typo</li>
  <li>h1 with San Serif Typo</li>
  </ol>
  
  <p>Is anyway to have more then variant for the same H tag name!? to add it to <code>createMuiTheme</code></p>