pkg resources will soon not work anymore

[jonas-fuchs]

Just a warning with 3.13 that I received and might cause issues later this year:

venv/lib/python3.13/site-packages/seqfold/__init__.py:2: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81. from pkg_resources import get_distribution, DistributionNotFound