* Move the metadata from `setup.py` into `setup.cfg`.
Added `pyproject.toml`.
Removed `setup.py` - it is no longer needed.
Got rid of tests erroroneously finding their way into the wheel.
* Started populating version automatically from git tags using `setuptools_scm`.
* Migrated the metadata into `PEP 621`-compliant `pyproject.toml`, got rid of `setup.cfg`.
* test build in develop and pull requests
* use static version instead of dynamic git tag info
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Co-authored-by: KOLANICH <kolan_n@mail.ru>
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