Why has coverage been locked to `==4.0.3` for two years? Why not `>=4.0.0`?

If I add localstack to my pipenv, I can't lock because of this unnecessary dependency.
plugin_configs = load_plugins()
    plugin_run_params = ' '.join([
        entry.get('docker', {}).get('run_flags', '') for entry in plugin_configs])
    services = os.environ.get('SERVICES', '')
    entrypoint = os.environ.get('ENTRYPOINT', '')
    cmd = os.environ.get('CMD', '')
    image_name = os.environ.get('IMAGE_NAME', constants.DOCKER_IMAGE_NAME)
    service_ports = config.SERVICE_PORTS
    force_noninteractive = os.environ.get('FORCE_NONINTERACTIVE', '')
    
    ports_list = sorted(service_ports.values())
    start_port = 0
    last_port = 0
    port_ranges = []
    for i in range(0, len(ports_list)):
        if not start_port:
            start_port = ports_list[i]
        if not last_port:
            last_port = ports_list[i]
        if ports_list[i] > last_port + 1:
            port_ranges.append([start_port, last_port])
            start_port = ports_list[i]
        elif i >= len(ports_list) - 1:
            port_ranges.append([start_port, ports_list[i]])
        last_port = ports_list[i]
    port_mappings = ' '.join(
        '-p {start}-{end}:{start}-{end}'.format(start=entry[0], end=entry[1])
        if entry[0] < entry[1] else '-p {port}:{port}'.format(port=entry[0])