Please drop dependency on python-nose which is abandoned by upstream

[winnieXY]

Below is a copy&paste from the Debian BTS - you can find the Debian bug here:
#1018597

Your package still uses nose 1, which is an obsolete testing framework for
Python, dead and unmaintained since 2015 2.

If you received this bug report, it means that your package either has a
build-dependency on python3-nose or uses that package in debian/tests/control.
If that is not the case, please reply and CC me explicitly.

Please port your package to one of the alternatives: nose2 4, pytest 5
or unittest from Python standard library 6.

There is a script called nose2pytest 7 which can assist with migrating from
nose to pytest.

This mass bug filing was discussed on debian-devel in 8.