[Makefile] Add support for pandoc 2 and disable smart extension (closes #16251)

[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,E741