mardown-urlize is not compatible with Markdown 3.4
Markdown 3.4 stop to support some features, which make incompatible markdown-urlize extension: https://github.com/r0wb0t/markdown-urlize.
List of blocking changes in this extension:
- md_globals argument isn't supported anymore
- markdown.util.etree had been removed for xml.etree.ElementTree
- to register an extension, we have to use Registry().register
Markdown 3.4 changelog: https://python-markdown.github.io/change_log/release-3.4/
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