Remove or upgrade django-setuptest test runner

[kbytesys]

With Django >=3 we are unable to execute tests, because django-setuptest needs to be updated or removed

https://stackoverflow.com/questions/59193514/importerror-cannot-import-name-six-from-django-utils

[shuckc]

As a workaround you can $ pip install django-utils-six then use $ python setup.py test as usual.

[kbytesys]

@Bishwas-py it's the second time that you pollute a bug report with your article, that's not related to this package. please stop it.

[Bishwas-py]

@Bishwas-py it's the second time that you pollute a bug report with your article, that's not related to this package. please stop it.

Sorry brother, I won't do it again!