Fixes#4.

I used two tools for this:

• https://github.com/gvalkov/setuptools-py2cfg
• https://github.com/abravalheri/ini2toml

I used the first to convertsetup.py tosetup.cfg, and the second fromsetup.cfg topyproject.toml, something like this:

pip install setuptools-py2cfg ini2tomlsetuptools-py2cfg setup.py> setup.cfgini2toml setup.cfg> pyproject.tomlrm setup.*

Next, I added a few more pre-commit hooks, one to formatpyproject.toml to make it easy to compare against other projects, and some others to check TOML and YAML files.

Then to check the output is okay, I ran:

pip install buildpython -m build

Which creates an sdist and wheel in thedist directory. I compared the output frommaster and from this branch, and there were no unexpected differences.

We're still using setuptools here as the "build backend", which is just fine. We can also easily change it to others too. I tend to use hatchling, but it doesn't make too much difference.