Pymdown-extensions

- **NEW**: FancyLists: Add new FancyLists extension.
- **NEW**: MagicLink: Change social links to support `x` instead of `twitter`. `twitter` is still recognized but is
now deprecated and will be removed at a future time.
- **NEW**: Emoji: Update Twemoji data to the latest.
- **FIX**: PathConverter: Fixes for latest changes in Python regarding `urlunparse`.

- **NEW**: Officially support Python 3.13.
- **FIX**: Snippets: Better handling of cases where URL snippet requests contain no header length.

- **FIX**: Snippets: Fix snippet line range with a start of line 1.

- **NEW**: Require Python Markdown 3.6+.
- **FIX**: Fix some test cases.
- **FIX**: Fix warnings due to recent changes in Python Markdown.

- **FIX**: SmartSymbols: Ensure symbols are properly translated in table of content tokens.

- **NEW**: Emoji: Update Twemoji and Gemoji data to latest.
- **NEW**: Emoji: Due to recent Gemoji update, non-standard emoji are no longer indexed. So emoji such as `:octocat:`
are no longer resolved.
- **NEW**: Highlight: Added new option `default_lang` which will cause code blocks with no language specifier to be
highlighted with the specified default language instead of plain text. This affects indented code blocks and code
blocks defined with SuperFences.
- **NEW**: InlineHilite: `style_plain_text` can be specified with a language string (in addition to its previous
boolean requirement) to treat inline code blocks with no explicit language specifier with a specific default
language.