fix tests related to 1978540a5122c53012e17a78841f3da0df77fd34(closes #10774)

[youtube-dl] / setup.cfg

[wheel]
universal = True

[flake8]
exclude = youtube_dl/extractor/__init__.py,devscripts/buildserver.py,devscripts/lazy_load_template.py,devscripts/make_issue_template.py,setup.py,build,.git
ignore = E402,E501,E731