Consider pyproject.toml as an option?

[tomschr]

Really cool project, thank you very much for all your efforts! :heart:

Problem

Modern Python project uses the pyproject.toml file to configure a project. However, this can't be selected by these cookiecutter templates.

Suggestion

If it's feasible, could we offer an option to select between setup.py and pyproject.toml? We could use setup.py as default, but offer the new option if people want to go this way.

Thanks!