Add support for Python 3.9 and 3.10 and 3.11 - #542

Add support for Python 3.9 and 3.10 and 3.11#542

ambv merged 4 commits into

html5lib:masterhtml5lib/html5lib-python:masterfrom

hugovk:add-3.9-3.10hugovk/html5lib-python:add-3.9-3.10Copy head branch name to clipboard