Move to pyproject.toml instead of setup.py for packaging

[gahjelle]

When installing parse with a recent version of Pip, I get the following warning:

DEPRECATION: parse is being installed using the legacy 'setup.py install' method, because it
does not have a 'pyproject.toml' and the 'wheel' package is not installed. pip 23.1 will enforce
this behaviour change. A possible replacement is to enable the '--use-pep517' option.
Discussion can be found at https:/pypa/pip/issues/8559

@r1chardj0n3s Would you be interested in a PR moving to a "modern" build system? I can also update the tests and classifiers so that they run on the currently supported Python versions: 3.7 to 3.11

[rnickle]

Running into a 517 issue with pip 23.0.1, poetry 1.2.2 and python 3.10:

Note: This error originates from the build backend, and is likely not a problem with poetry but with parse (1.19.0) not supporting PEP 517 builds. You can verify this by running 'pip wheel --use-pep517 "parse (==1.19.0)"'.

On the other hand, I seem to have no trouble at all building parse as suggested:

pip wheel --use-pep517 "parse (==1.19.0)" --no-cache-dir

[wimglenn]

This is also because it's installing from sdist (no wheel on PyPI).
Related: #144

[wildone]

Addin

Running into a 517 issue with pip 23.0.1, poetry 1.2.2 and python 3.10:

Note: This error originates from the build backend, and is likely not a problem with poetry but with parse (1.19.0) not supporting PEP 517 builds. You can verify this by running 'pip wheel --use-pep517 "parse (==1.19.0)"'.

On the other hand, I seem to have no trouble at all building parse as suggested:

pip wheel --use-pep517 "parse (==1.19.0)" --no-cache-dir

Adding --use-pep517 "parse (==1.19.0)" to my pip install command worked! Thank you. I am on Python 3.10.