py-pygments: update to 2.18.0.

Version 2.18.0
--------------
(released May 4th, 2024)

- New lexers:

  * Janet (#2557)
  * Lean 4 (#2618, #2626)
  * Luau (#2605)
  * Mojo (#2691, #2515)
  * org-mode (#2628, #2636)
  * Promela (#2620)
  * Soong / ``Android.bp`` (#2659)
  * Tact (#2571)
  * Typst (#2596)

- Updated lexers:

  * Awk: recognize ternary operator (#2687)
  * Bash: add ``openrc`` alias (#2599, #2371)
  * Coq: add keywords, lex more vernacular command arguments, produce
    fewer tokens on heading comments (#2678)
  * DNS zone files: Fix comment parsing (#2595)
  * Hy: Support unicode literals (#1126)
  * Inform6: Update to Inform 6.42 (#2644)
  * lean: Fix name handling (#2614)
  * Logtalk: add ``uninstantiation`` keyword and recognize
    escape sequences (#2619)
  * Macaulay2: Update to 1.23 (#2655)
  * Python: fix highlighting of soft keywords before ``None``/``True``/``False``
  * reStructuredText: use ``Token.Comment`` for comments instead of
    ``Comment.Preproc`` (#2598)
  * Rust: highlight ``:``, ``::`` and ``->`` as ``Punctuation``
    and whitespace as ``Whitespace``, instead of ``Text``
    in both cases (#2631)
  * Spice: Add keywords (#2621)
  * SQL Explain: allow negative numbers (#2610)
  * Swift: Support multiline strings (#2681)
  * ThingsDB: add constants and new functions; support template
    strings (#2624)
  * UL4: support nested ``<?doc?>`` and ``<?note?>`` tags (#2597)
  * VHDL: support multi-line comments of VHDL-2008 (#2622)
  * Wikitext: Remove ``kk-*`` in ``variant_langs`` (#2647)
  * Xtend: Add ``val`` and ``var`` (#2602)

- New styles:

  * Coffee (#2609)

- Make background colors in the image formatter work with Pillow 10.0 (#2623)
- Require Python 3.8. As a result, the ``importlib-metadata`` package
  is no longer needed for fast plugin discovery on Python 3.7.
  The ``plugins`` extra (used as, e.g., ``pip install pygments[plugins]``)
  is kept for backwards compatibility but now has no effect. (#2601)
- Require the ``url`` attribute for lexers inside Pygments, add
  it to many lexers (#2588)
- Replace Pyflakes linter with Ruff (#2592)
- Add macOS CI (#2594)
- Built-in lexers now declare the version of Pygments in which they were
  added in a required ``version_added`` lexer attribute, instead of a
  ``.. versionadded::`` directive in the docstring (#2589, #2634)
- The ``url`` attribute is now required for built-in lexers and
  has been added to all existing lexers (#2588)
- The RTF formatter supports line number and line highlighting now (#1217, #2654)
- Add ``\sa0`` keyword in the RTF formatter (#1111, #2607)
- Register ``pycon`` as an alias for the Python console lexer (#2697)
- Add MIME-Type for ``DesktopLexer`` (#2613)
- Fix native style to meet WCAG AA guidelines (#2600)
- Fix typo in documentation (#2672)
- Use format strings consistently (#2661)
- Add ``__class_getitem__`` to ``Formatter`` to improve typing support (#2665)

(wiz)