Recognize class names with leading dots

[kaathewisegit]

This is somewhat of a niche use-case, but I'm using Djot, a Markdown-like markup language, which allows specifying classes:

[A styled span]{.bg-orange-400}

TailwindCSS doesn't recognize these, however, because they start with a dot. It'd be nice to have a config option which would allow ignoring the leading dots