Bump dependencies, update pytest config for pytest 9

[zweizeichen]

I took a stab at this not knowing much about the project structure. I updated the direct dependency to pytest 9, updated the config structure (no more .ini_options) and bumped pytest-asyncio to a version that allows pytest 9 as a transitive dependency.
If we're lucky, skipping multiple versions of pytest-asyncio should not break too many things, at least I remember that from another project, but we also did a few fun things with event loops.

• Bump pytest to 9.0
• Adapt config to pytest 9.0
• Update pytest-asyncio to current release
• Drop support for Python 3.9 (EOL)
• Add Python 3.14 to testing matrix

[olivierdolle]

I think you need to drop support for python 3.9 as it is not supported by pytest 9

[zweizeichen]

@Colin-b what do you think? While we're at it, should I add 3.14 to the testing matrix, too?

[sonarqubecloud]

Quality Gate failed

Failed conditions
1 Security Hotspot

See analysis details on SonarQube Cloud

[zweizeichen]

@Colin-b update: I tested a few things:

• Bumping pytest-cov did not really work. I guess that is because you're running pytest in subprocess mode and the latest changelog mentions a few changes there. It caused lots of tests to fail, even after I added the plugin config to the pyproject.toml. But maybe it was just my setup. nevertheless I removed that change from this MR to keep the scope from exploding too much.
• I also bumped the github actions versions for the workflows. Maybe consider enabling dependabot in the future. This can help keep this up-to-date, so far everything seems to work fine.
• I also enabled Python 3.14 in the workflow matrix and it looks like it works as expected

There's just one issue left: apparently either coverage is reported (or has been reported until now) incorrectly and one line seems to not be covered by the test suite. Please review the log output. I can give this another look if you want but I suspect it's something you can figure out within seconds while it would take me some time to familiarize myself with the test suite, your call. I hope this helps.

Cheers!

[Colin-b]

Thanks a lot, yeah this part is my fault actually. It is part of a new feature that still needs more testing, I should have merged the proposal in a dedicated branch instead of develop.

[zweizeichen]

No worries man, thank you for building and maintaining this!