Log message:
*: clean-up after python38 removal

Log message:
py-myst-parser: updated to 4.0.0

4.0.0 - 2024-08-05

This release bumps the supported versions of:

- Python to ``3.10`` and greater
- Sphinx to ``>=7,<9``
- Docutils to ``>=0.19,<0.22``

Additionally, footnotes are now parsed similar to the corresponding \ 
reStructuredText, in that resolution (between definitions and references) and \ 
ordering is now deferred to transforms on the doctree (in <gh-pr:931>).

This allows for the proper interaction with other docutils/sphinx transforms, \ 
including those that perform translations,
and logging of warnings for duplicate/unreferenced footnote definitions and also \ 
for footnote references with no definitions.

Log message:
py-myst-parser: added version 2.0.0

MyST is a rich and extensible flavor of Markdown meant for technical
documentation and publishing.