fix warnings, migrate to pyproject.toml

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• Description of PR explains the context of change
• Unit tests cover the change, no broken tests
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• Switch terminaltables with terminaltables3 since the current maintainer lost PyPI access and had to republish under the new name (see New release matthewdeanmartin/terminaltables3#3 (comment)) Has since been fixed with 731b648
• Fix several SyntaxWarning's on python 3.12: https://docs.python.org/3/whatsnew/3.12.html#other-language-changes
• Migrate to pyproject.toml, which is the modern replacement for setup.py
• Drop support for unsupported python versions and remove build dependencies from runtime dependencies (cython and setuptools)

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Hi @pavelmarik, are you interested in this PR? Would love to see this merged as it fixes several issues for Homebrew users