Dependency issue when installing via Python 3.8.13 via

pip install -r requirements.txt

results in

The conflict is caused by:
    The user requested pyflakes==2.4.0
    flake8 3.9.1 depends on pyflakes<2.4.0 and >=2.3.0

I have manually fixed the dependecies in https://github.com/cschindlbeck/PP-P2P-Parser/tree/fix-python-3.8.13-dependencies

This could also be related to #490