Use 'hatch version' instead of manually updating the version

[felixfontein]

We did this change to antsibull-docs some time ago. I had to fix that a bit today with ansible-community/antsibull-docs@676780b. This PR applies the noxfile changes to this project as well.

[gotmax23]

This won't work unless you define __verison__ in __init__.py and configure hatch in pyproject.toml to read the version from there like we did for antsibull_docs.

[felixfontein]

Hmm, indeed. I find it very strange that hatch doesn't mind updating the version in random files, but not in pyproject.toml. I also wasn't able to find any informatoin on why that's the case; I found a PR pypa/hatch#66 but doesn't give any information on why it was closed (and the PR is broken on GH's side as well).

[gotmax23]

Yeah, hatch version does not support updating the version in pyproject.toml. This can be done pretty easily with tomlkit, but it just hasn't been implemented.

[felixfontein]

Closing in favor of #562.