url-normalize 1.4.3-3 FTBFS

[Pushkar Kulkarni]

These build-time tests fail [1] because "ModuleNotFoundError: No module named 'six'":

FAIL Required test coverage of 99% not reached. Total coverage: 8.93%
=========================== short test summary info ============================
ERROR tests/test_deconstruct_url.py
ERROR tests/test_generic_url_cleanup.py
ERROR tests/test_normalize_fragment.py
ERROR tests/test_normalize_host.py
ERROR tests/test_normalize_path.py
ERROR tests/test_normalize_port.py
ERROR tests/test_normalize_query.py
ERROR tests/test_normalize_scheme.py
ERROR tests/test_normalize_userinfo.py
ERROR tests/test_provide_url_scheme.py
ERROR tests/test_reconstruct_url.py
ERROR tests/test_url_normalize.py
!!!!!!!!!!!!!!!!!!! Interrupted: 12 errors during collection !!!!!!!!!!!!!!!!!!!

[1] https://launchpadlibrarian.net/736780157/buildlog_ubuntu-oracular-amd64.url-normalize_1.4.3-3_BUILDING.txt.gz