• Merge changes from the pandoc default LaTeX template (as of 2023-03-29, a5159c2).
• Fix placement of float figures (tables, images, etc.). Float figures should now appear
  exactly where they are included. The option float-placement-figure is also restored.
• Remove Travis CI build
• Fix wrong font sizes on the title page. The problem went away on its own, likely because
  of an updated LaTeX package.