Readme-renderer

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* Allow HTML5 ``nav`` tag through cleaner (259)

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* Remove command line example from docs (197)
* Multiple pyproject.toml fixes (251)
* Confirm handling multiple inline strong (252)
* Convert RST output to HTML5 (253)
* Add Typing to classifiers (254)
* Development tweaks - coverage reporting, actions updates (255)
* Add test confirming behavior with unknown lexers (256)

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* Enable gitpod development (238)
* Allow rst admonitions to render (242)
* Add badges to README (243)
* Update codebase for modern Python (244)
* Fix table cell spans (245)
* Allow ``math`` directive in rst (246)
* Preserve ``lang`` attribute in ``pre`` (247)

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* Add py.typed to the built wheel (228)
* Use isolated build for tox (229)
* Fix renderer ignore (230)
* Remove legacy check command and distutils (233)
* Emit a warning when no content is rendered (231)
* Drop support for Python 3.6 (236)
* Update html attribute order in tests (235)

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* Add static types (225)

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* Support cmarkgfm>=0.8.0 (224)
* Support Python 3.10