Transition `setup.cfg` to `pyproject.toml`

[rmartin16]

• Project metadata is now consolidated in to pyproject.toml
• The published wheel no longer includes the py2 platform
• Manage versioning via git tags with setuptools_scm

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (2fab922) 100.00% compared to head (d5e7fa7) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #369 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 14 14 Lines 1977 1977 Branches 360 360 ========================================= Hits 1977 1977 ```

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