Update pre-commit libraries, use pre-commit trappings for online testing

[stucka]

For warn-scraper @chriszs implemented a great mechanism that allows pre-commit routines to be run as part of the CI/CD workflow without a parallel linting scheme. The code is here: biglocalnews/warn-scraper@37d5d90

We're also quite a few versions behind in some of the linting tooling (e.g., mypy==1.5.1 vs 1.9.0) and this may be a good time to update those and verify production code meets the more-modern standards.

[stucka]

Closing with 1.3.117...1.3.118

Dropped Python 3.7 support, as Python dropped support for 3.7 in July 2023.