Switch to pyproject.toml

[silv-io]

This PR switches over the project specification to plain pyproject.toml instead of using setup.cfg, setup.py and pyproject.toml.

This is the current most up-to-date way to specify projects in Python.

The change causes minor differences in the resulting package:

$ diff SOURCES.txt /tmp/with-toml/SOURCES.txt                
4,5d3
< setup.cfg
< setup.py
18d15
< rolo.egg-info/not-zip-safe

$ diff PKG-INFO /tmp/with-toml/PKG-INFO                        
5,7c5,208
< Home-page: https://github.com/localstack/rolo
< Author: LocalStack Contributors
< Author-email: [email protected]
---
> Author-email: LocalStack Contributors <[email protected]>
> License: 
> <Comment by silv-io: Here we have the entire license file>
>         
16c217,218
< Description-Content-Type: text/markdown; charset=UTF-8
---
> Requires-Python: >=3.10
> Description-Content-Type: text/markdown

$ diff requires.txt /tmp/with-toml/requires.txt

$ diff top_level.txt /tmp/with-toml/top_level.txt

$ diff dependency_links.txt /tmp/with-toml/dependency_links.txt

Also, the file not-zip-safe is removed as well.

If it is very important, the changes to the PKG-INFO can be adapted to exactly resemble the previous version.

Regarding the not-zip-safe file, the setuptools userguide for pyproject.toml suggests that it is obsolete:

Obsolete - only relevant for pkg_resources, easy_install and setup.py install in the context of eggs (deprecated).

If we still need that, we can still add it in the toml file.

[thrau]

nice cleanup! 👌 just a minor thing to fix in the version descriptor