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.
return process
            finally:
                mutex_popen.release()
        except subprocess.CalledProcessError as e:
            if print_error:
                print("ERROR: '%s': %s" % (cmd, e.output))
            raise e
    if cache_duration_secs <= 0:
        return do_run(cmd)
    hash = md5(cmd)
    cache_file = CACHE_FILE_PATTERN.replace('*', hash)
    if os.path.isfile(cache_file):
        
        mod_time = os.path.getmtime(cache_file)
        time_now = now()
        if mod_time > (time_now - cache_duration_secs):
            f = open(cache_file)
            result = f.read()
            f.close()
            return result
    
    result = do_run(cmd)
    f = open(cache_file, 'w+')
    f.write(result)
    f.close()
    clean_cache()
    return result
def clone(item):
    return json.loads(json.dumps(item))
def remove_non_ascii(text):