build: use pep517/pep621

[trim21]

replace legacy setup.py with pyproject.toml pep517/pep621 config

[Delgan]

Thank you for modernizing the project @trim21!

I've made a few fix to the CI runners, can you try rebasing your PR please? However, I do not explain the failure for Python 3.6.

[trim21]

Thank you for modernizing the project @trim21!

I've made a few fix to the CI runners, can you try rebasing your PR please? However, I do not explain the failure for Python 3.6.

would you mind enable this option in repo settings? so I can update branch in web-ui instead of local git client.

[Delgan]

would you mind enable this option in repo settings? so I can update branch in web-ui instead of local git client.

Done, thanks for the suggestion. 👍

[trim21]

I guess, ci failed because setuptools support python3.5/3.6 are very out-dated and doesn't support new feature we are using.

[trim21]

at fitst I want to continue using setuptools but python3.5/3.6 are too old and setuptools support theee 2 versions missing some feature we need and doesn't have a full support for pep621.

So I have to use flit to make it work on these 2 versions.

If you want to continue using setuptools we need drop these 2 python versions first.