title: missing icons with Snowpack + Svelte + svelte-materialify
body: <p>I am trying to get snowpack to work with svelte-materialify.
  I created an app with <code>create-snowpack-app svelte-snowpack --template @snowpack/app-template-svelte</code>, followed by <code>yarn install svelte-materialify</code>.</p>
  <p>All the CSS seem to work, a simple <code>MaterialApp</code> with a demo <code>AppBar</code> works: CSS, light/dark theme, animations etc. - except that the icons are completely missing. No error in Js console.</p>
  <p>On the snoepack site, there are examples for webpack and rollup - these don't seem to be necessary for snowpack - the postcss plugin is already activated, and seems to do the trick here. So, everything fine, except for icons.</p>
  <p>Any thoughts?</p>