Pytest-runner is deprecated

[dbaynard]

markdown-to-sqlite/setup.py

Line 28 in e6b852a

setup_requires=["pytest-runner"],

As per pytest-runner · PyPI, this package is deprecated. It has been removed from nixpkgs, which breaks flakes/databases/sqlite/markdown-to-sqlite.nix at main · fore-stun/flakes.

I'm sure there's a straightforward replacement — I'd imagine the changes would apply across a number of repos, though.