move build configuration from setup.cfg to pyproject.toml

[zacharyburnett]

setuptools now supports the [project] table, which is defined by PEP621.

Additionally, setuptools now supports its own entry in pyproject.toml called [tool.setuptools] (pypa/setuptools#1688, https://setuptools.pypa.io/en/latest/userguide/pyproject_config.html#setuptools-specific-configuration); however, it comes with the following disclaimer:

Support for declaring configurations not standardized by PEP 621 (i.e. the [tool.setuptools] table), is still in beta stage and might change in future releases.

Reading toml is supported natively in Python 3.11 with tomllib

Given this, we can attempt to consolidate the build configuration into a single pyproject.toml file that can possibly be read by other build systems in the future.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.55 🎉

Comparison is base (53eb816) 87.50% compared to head (b545747) 88.05%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #11      +/-   ##
==========================================
+ Coverage   87.50%   88.05%   +0.55%     
==========================================
  Files           9        9              
  Lines         192      201       +9     
==========================================
+ Hits          168      177       +9     
  Misses         24       24              

see 2 files with indirect coverage changes

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[duytnguyendtn]

Installs and imports nicely on my side. Thanks for the modernization effort!