Modernize Python compatibilities and bump lspopt version

[remrama]

Just upgraded overall compatibilities and thought I would bump the version so that it would be easier to toss this onto PyPI. Changes listed below, copy/pasted from what I put in the CHANGELOG.md with some added links for context:

[1.4.0] - 2025-01-07

Added

• Support for Python 3.12 [ Status of Python versions ]
• Support for pip>=25 [ Deprecate pip install --editable calling setup.py develop pypa/pip#11457 ]
• Support for numpy>=2
• Support for Windows and macOS

Removed

• Support for Python 3.7 and 3.8
• Unused imports

[hbldh]

Sorry, I forgot to publish it after merging the last PR... Thank you for continuing to push this.

There was an issue with 3.7 and 3.8 which I was planning on fixing first; but I think in this instance it is more prudent to just get it out instead...

I will merge this and rewrite the setup.py to a setup.cfg instead, to be more in step with the newer developments in Python.

[hbldh]

@remrama Version 1.4.0 has now been published to PyPI. Please test it, since I have changed some parts of the publishing solution. I think everything is there, but get back to me if something does not work all of a sudden.

[remrama]

Thanks @hbldh, I just tested with a reinstall and quick usage with v1.4 and everything went smooth. Much appreciated 👍

[hbldh]

Once again, thank you so much for this effort! I appreciate this, even though I forgot to upload it...

This code is actually from my Master's thesis. I had the author of the multitaper paper as a teacher and she wanted me to use it for analysing eye tracking data. It is nice to know that it is of some use for other people as well!