message: Link to the author's Twitter profile instead of GitHub.
diff: export let showIconOnly: boolean;
  </script>
  +<!-- We use the GitHub profile image because the Twitter profile image needs an authenticated API call -->
  <span class="author">
  {#each author.split(", ") as username}
  {#if showIconOnly}
  - <a href="https://github.com/{authors[username].socialProfiles.github}"
  + <a href="https://twitter.com/{authors[username].socialProfiles.twitter}"
  ><img
  src="https://github.com/{authors[username].socialProfiles.github}.png"
  alt="Avatar of {authors[username].name}"
  />
  </a>
  {:else}
  - <a href="https://github.com/{authors[username].socialProfiles.github}"
  + <a href="https://twitter.com/{authors[username].socialProfiles.twitter}"
  ><img
  src="https://github.com/{authors[username].socialProfiles.github}.png"
  alt="Avatar of {authors[username].name}"
  