Cmarkgfm

What's Changed
* update cmark-gfm (0.29.0.gfm.6 -> 0.29.0.gfm.13) by danigm in https://github.com/theacodes/cmarkgfm/pull/63
* Build Python 3.12 wheels by madig in https://github.com/theacodes/cmarkgfm/pull/65

New Contributors
* danigm made their first contribution in https://github.com/theacodes/cmarkgfm/pull/63
* madig made their first contribution in https://github.com/theacodes/cmarkgfm/pull/65

**Full Changelog**: https://github.com/theacodes/cmarkgfm/compare/2022.10.27...2024.1.14

* Build wheels for Python 3.11
* Update cmark-gfm from `0.29.0.gfm.3` to `0.29.0.gfm.6`

* Create wheels for Python 3.11

* Updated cmark to 0.29.0.gfm.3
* Switched to calendar versioning

* Create wheels for Python 3.10
* Drop support for Python 2.7 and 3.5

The output generated by `cmarkgfm.github_flavored_markdown_to_html` for code blocks has changed to be in line with that of github.com.
This change **may break existing css rules** as code blocks were generated differently for `cmarkgfm<0.6.0`.

`diff
- <pre><code class="language-python">print('hello')
+ <pre lang="python"><code>print('hello'
</code></pre>
`

Thank you nschloe for this contribution.