Update sphinx to 7.0.0

[pyup-bot]

This PR updates sphinx from 6.2.1 to 7.0.0.

Changelog

7.0.0

=====================================

Incompatible changes
--------------------

* 11359: Remove long-deprecated aliases for ``MecabSplitter`` and
``DefaultSplitter`` in ``sphinx.search.ja``.
* 11360: Remove deprecated ``make_old_id`` functions in domain object
description classes.
* 11363: Remove the Setuptools integration (``build_sphinx`` hook in
``setup.py``).
* 11364: Remove deprecated ``sphinx.ext.napoleon.iterators`` module.
* 11365: Remove support for the ``jsdump`` format in ``sphinx.search``.
* 11366: Make ``locale`` a required argument to
``sphinx.util.i18n.format_date()``.
* 11370: Remove deprecated ``sphinx.util.stemmer`` module.
* 11371: Remove deprecated ``sphinx.pycode.ast.parse()`` function.
* 11372: Remove deprecated ``sphinx.io.read_doc()`` function.
* 11373: Removed deprecated ``sphinx.util.get_matching_files()`` function.
* 11378: Remove deprecated ``sphinx.util.docutils.is_html5_writer_available()``
function.
* 11379: Make the ``env`` argument to ``Builder`` subclasses required.
* 11380: autosummary: Always emit grouped import exceptions.
* 11381: Remove deprecated ``style`` key for HTML templates.
* 11382: Remove deprecated ``sphinx.writers.latex.LaTeXTranslator.docclasses``
attribute.
* 11383: Remove deprecated ``sphinx.builders.html.html5_ready`` and
``sphinx.builders.html.HTMLTranslator`` attributes.
* 11385: Remove support for HTML 4 output.

Links

• PyPI: https://pypi.org/project/sphinx
• Changelog: https://pyup.io/changelogs/sphinx/

[luzfcb]

blocked by readthedocs/sphinx_rtd_theme#1463

[pyup-bot]

Closing this in favor of #4335