Updates a nunber of dependencies in a single PR. These were
suggested by dependabot but updating them individually would
mean the reposistory would be in a broken state until everything
had merged.
I'm not personally a huge fan of lowercasing doctype, but
Prettier has taken an opinionated stance here and there is not a
way to disable it:
https://github.com/prettier/prettier/issues/15096
d2296fac85