Support flake8:local-plugins

[adzenith]

Flake8 supports a second section in the setup.cfg that specifies local plugins. I'm not able to get that to work with this tool, and I took a look at the source and it looks like it only checks the normal flake8 section. Any chance support for this other section could be added?
Also just wanted to say thanks and that this project is amazing. 👍

[john-hen]

Thanks for pointing this out. Yeah, absolutely, that can be added. Do you want to do it?

I guess it's pretty straightforward to implement. Adding a meaningful test will be more difficult. But maybe we can do without a test in this case? I'm open to that if it complicates things too much. (Maybe because I won't be using that feature.)

[tmarenko]

Seems it'd be quite hard. I took a look how flake8 loads plugins and how this project works.
You'd need to pass options for your local plugin right before plugin loading but this project, flake8-pyproject, itself is considered a flake8 plugin. Basically you can't hook anything before this line (before all plugins are registered) so seems it'd be quite difficult to load another plugin additionally after that.

[tmarenko]

For anyone interested, I've made tests for local-plugins section: bed3c41