Update blacken-docs to 1.19.1

[pyup-bot]

This PR updates blacken-docs from 1.16.0 to 1.19.1.

Changelog

1.19.1

-------------------

* Add support for Black's ``--pyi`` flag.

Thanks to Alex Waygood in `PR 375 <https://github.com/adamchainz/blacken-docs/pull/375>`__.

1.19.0

-------------------

* reStructuredText: Gracefully ignore empty code blocks.

Thanks to Stephen Rosen in `PR 368 <https://github.com/adamchainz/blacken-docs/issues/368>`__.

* Drop Python 3.8 support.

* Support Python 3.13.

1.18.0

-------------------

* Add support for on/off comments.

Thanks to Timothée Mazzucotelli in `PR 287 <https://github.com/adamchainz/blacken-docs/pull/287>`__.

* Fix Markdown ``pycon`` formatting to allow formatting the rest of the file.

1.17.0

-------------------

* Add a ``--check`` option.
When used, blacken-docs will not modify files but indicate when changes are necessary with a message and non-zero exit code.

Thanks to Joaquim Esteves in `PR 278 <https://github.com/adamchainz/blacken-docs/pull/278>`__.

* Allow options in LaTeX minted blocks.

Thanks to Peter Cock in `PR 313 <https://github.com/adamchainz/blacken-docs/pull/313>`__.

* Ignore language specifiers after newlines in Markdown code blocks.

Thanks to Harutaka Kawamura in `PR 283 <https://github.com/adamchainz/blacken-docs/pull/283>`__.

Links

• PyPI: https://pypi.org/project/blacken-docs
• Changelog: https://data.safetycli.com/changelogs/blacken-docs/