Markdown-katex

- Fix [14](https://gitlab.com/mbarkhau/markdown-katex/-/issues/14): Since `Markdown>=3.3` support for [Markdown in HTML][md_in_html] was broken.

[md_in_html]: https://python-markdown.github.io/extensions/md_in_html/

Thank you summersz for reporting this issue.

- Use node12 for KaTeX binary on Windows

- Update KaTeX binaries to v0.13.0

- Fix [12](https://gitlab.com/mbarkhau/markdown-katex/-/issues/12): Bug in handling of paths with whitespace. (Thanks summersz !)

- Fix [9](https://gitlab.com/mbarkhau/markdown-katex/-/issues/9): Update `katex.css`
- Fix [8](https://gitlab.com/mbarkhau/markdown-katex/-/issues/8): Lookup of binaries on windows
- Update documentation wrt. use with WeasyPrint

- Update KaTeX binaries to v0.12.0
- Fix [8](https://gitlab.com/mbarkhau/markdown-katex/-/issues/8): Update binaries...
- Fix [7](https://gitlab.com/mbarkhau/markdown-katex/-/issues/7): Lookup of binaries via npx