update to pyproject.toml

[maurerle]

When install pwlf through pip, currently the following error message is presented:

DEPRECATION: pwlf 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 pypa/pip#8559

Note, that this is also the case for the pyDOE dependency which did not see any updates since 2015:
https://github.com/tisimst/pyDOE/issues

If you need help with packagin, I can draft a pyproject.toml for you

[cjekel]

Thanks for heads up!

I tested the install with pip==23.1 and pip==24.3.1 and it seems that everything works. It looks like the pypa folks decided to make pep517 the default, so that wheels are built from source in isolated environments.

Alternatives to pyDOE include just using scipy, pyDOE2, pyDOE3, diversipy.

I just gave the scipy implementation a test, and for what I'm doing in 1d it will work fine.

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#120