bump tested snakemake version

[rueberger]

As of today, installing with snakemaked pinned to 7.30.2 with python 3.9.0 and 3.10.7 installs PuLP 2.8.0, which breaks snakemake with

Traceback (most recent call last):
  File "/home/users/a5b/venvs/debardeur/bin/snakemake", line 8, in <module>
    sys.exit(main())
  File "/home/users/a5b/venvs/debardeur/lib/python3.9/site-packages/snakemake/__init__.py", line 2696, in main
    parser = get_argument_parser()
  File "/home/users/a5b/venvs/debardeur/lib/python3.9/site-packages/snakemake/__init__.py", line 1589, in get_argument_parser
    lp_solvers = pulp.list_solvers(onlyAvailable=True)
AttributeError: module 'pulp' has no attribute 'list_solvers'

longterm, should bump tested snakemake to latest.

in the meanwhile this can be resolved with pip install PuLP 2.7.0