Fix runtime requirement on beautifulsoup4
    
    bs4 is a dummy package managed by the developer of Beautiful Soup to prevent
    name squatting. The official name of PyPI’s Beautiful Soup Python package is
    beautifulsoup4. The bs4 package ensures that if you type pip install bs4 by
    mistake you will end up with Beautiful Soup.
    
    Fedora doesn't have the dummy bs4 package packaged.