BUILD: Update jupytext requirement from <1.18,>=1.16.0 to >=1.16.0,<1.19

[dependabot]

Updates the requirements on jupytext to permit the latest version.

Release notes

Sourced from jupytext's releases.

Version 1.18.1

Fixed

• Fixed test test_check_source_is_newer_when_using_jupytext_sync to work reliably on systems with low filesystem timestamp resolution (#1460)

Changed

• We now use pixi to maintain the local Python environments used for developing and testing Jupytext.

Changelog

Sourced from jupytext's changelog.

1.18.1 (2025-10-19)

Fixed

• Fixed test test_check_source_is_newer_when_using_jupytext_sync to work reliably on systems with low filesystem timestamp resolution (#1460)

Changed

• We now use pixi to maintain the local Python environments used for developing and testing Jupytext.

1.18.0 (2025-10-18)

Added

• The documentation has a chapter on the Jupytext Sync extension for VS Code (#1395)
• We have added a new option --check-source-is-newer to the Jupytext CLI. Use this option if you want to make sure that the file passed as argument to Jupytext is the newest of all paired files, and/or newer than the destination file.
• We have added a section on Jupyter Collaboration which also provides a very useful autoreload functionality (#406, #1401)
• Pairing groups allow you to define different pairing configurations for specific subsets of notebooks. The formats configuration option now supports a list of format dictionaries for first-match pairing. Use [[formats]] sections in your TOML configuration to define multiple format specifications, where the first matching format is used. This allows applying different pairing rules to notebooks in different locations, such as generating documentation markdown files only for tutorial notebooks (#1383)
• We have added more tests to document the complex pairing formats, which also work on Windows (#1028)
• Pairing into nested folders was fixed on Windows (#1028)
• Jupytext is now tested with Python 3.14 (#1456)

Fixed

• The Jupytext CLI now detects if a file it has read or consulted has been modified while it was processing it. That can happen in the context of the Jupytext Sync extension for VS Code (#1411, [vscode-jupytext-sync-#12](caenrigen/vscode-jupytext-sync#12)). When such a synchronous modification is detected, Jupytext now raises an error. Many thanks to Anne Archibald for reporting the issue and preparing an inspiring PR (#1417).
• We don't import notebook when jupyter_server is available (#1436)
• Jupytext now supports more characters in the cell metadata keys, to improve compatibility with jupyterlab-slideshow (#1441). Thanks to Nicolas Thierry for this fix.
• The function find_jupytext_configuration_file now works with relative directories (#1440). This fix was contributed by Thierry Parmentelat.
• We have fixed a parsing error for R Markdown files (#1429)
• We have fixed a parsing error when the first cell of the notebook contains a YAML header that is not a dict (#1444)

Changed

• We have updated the pre-commit hooks. The code is now formatted using ruff format, and updated for Python 3.9+ using https://github.com/asottile/pyupgrade (#1423)

1.17.3 (2025-08-28)

Added

• All the extensions supported by Jupytext now appear in the --to paragraph of jupytext --help (#433)
• We have added a new function get_formats_from_notebook_path that returns the list of paired formats for a given notebook (#1419)

Fixed

• We have fixed jupytext --sync, and the contents manager, to make sure that a simple .py file (not in the percent format) will not be treated as a paired file when the Jupytext configuration file has formats="ipynb,py:percent" (#1418)
• A notebook can be moved in Jupyter even if that makes it unpaired (#1414)
• The test against jupyter-fs now installs its fs extra dependency (#1398)
• The jupytext --sync command now works correctly with symbolic links. Thanks to mccullerlp for reporting (#1407) and addressing (#1408) the problem!
• Jupytext will look for quarto.cmd on Windows. Thanks to mccullerlp for documenting the issue (#1406, #1409).
• We have corrected the jupytext --paired-paths command: it will now take the Jupytext configuration file, if any, into account (#1419)

... (truncated)

Commits

• 760013e Fix timestamp issue in test_check_source_is_newer_when_using_jupytext_sync (#...
• 2a9162d Transition to Pixi
• f412847 Version 1.18.0
• 860d9c0 Add an example jupyterlab-slideshow notebook
• b39919e Test Jupytext with Python 3.14 (#1457)
• 72ed864 Support formats lists for subset-specific notebook pairing (#1453)
• 0b453a3 Add more tests to demonstrate the pairing, including on Windows
• f96cfec Revert "Fix Windows path separator issue in paired notebooks (#1454)"
• 3b47cde Fix Windows path separator issue in paired notebooks (#1454)
• bc4f23e Fix AttributeError when raw cell contains non-dict YAML content (#1451)
• Additional commits viewable in compare view

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.29%. Comparing base (61814c1) to head (3642db3).

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1587       +/-   ##
===========================================
+ Coverage   52.01%   72.29%   +20.27%     
===========================================
  Files         260      260               
  Lines       39345    39345               
===========================================
+ Hits        20467    28443     +7976     
+ Misses      18878    10902     -7976     

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[svandenb-dev]

LGTM