chore(deps-dev): bump sphinx from 3.5.4 to 4.0.1

[dependabot-preview[bot]]

Bumps sphinx from 3.5.4 to 4.0.1.

Changelog

Sourced from sphinx's changelog.

Release 4.0.1 (released May 11, 2021)

Bugs fixed

• #9189: autodoc: crashed when ValueError is raised on generating signature from a property of the class
• #9188: autosummary: warning is emitted if list value is set to autosummary_generate
• #8380: html search: tags for search result are broken
• #9198: i18n: Babel emits errors when running compile_catalog
• #9205: py domain: The :canonical: option causes "more than one target for cross-reference" warning
• #9201: websupport: UndefinedError is raised: 'css_tag' is undefined

Release 4.0.0 (released May 09, 2021)

Dependencies

4.0.0b1

• Drop python 3.5 support
• Drop docutils 0.12 and 0.13 support
• LaTeX: add tex-gyre font dependency

4.0.0b2

• Support docutils-0.17. Please notice it changes the output of HTML builder. Some themes do not support it, and you need to update your custom CSS to upgrade it.

Incompatible changes

4.0.0b1

• #8539: autodoc: info-field-list is generated into the class description when autodoc_typehints='description' and autoclass_content='class' set
• #8898: extlinks: "%s" becomes required keyword in the link caption string
• domain: The Index class becomes subclasses of abc.ABC to indicate methods that must be overrided in the concrete classes
• #4826: py domain: The structure of python objects is changed. A boolean value is added to indicate that the python object is canonical one
• #7425: MathJax: The MathJax was changed from 2 to 3. Users using a custom MathJax configuration may have to set the old MathJax path or update their configuration for version 3. See :mod:sphinx.ext.mathjax.
• #7784: i18n: The msgid for alt text of image is changed

... (truncated)

Commits

• bdce720 Bump to 4.0.1 final
• 8a84d16 Merge pull request #9208 from tk0miya/9201_UndefinedError_websupport
• fa8212a Fix #9201: websupport: UndefinedError is raised: 'css_tag' is undefined
• aa9fab5 Merge pull request #9207 from tk0miya/9205_canonical_conflicts
• 4ab0dba Fix #9205: py domain: canonical option causes xref resolution error
• d2c8cd3 Merge pull request #9206 from tk0miya/9198_compile_catalog
• 0a7e321 Merge branch '4.0.x' into 9198_compile_catalog
• 5b994fc Merge pull request #9192 from tk0miya/8380_broken_search_tags
• fc93925 Update message catalogs
• 2aca5a2 Fix #9198: i18n: Babel emits errors when running compile_catalog
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

One of your CI runs failed on this pull request, so Dependabot won't merge it.

• Unit tests (3.7, windows-latest)
• Unit tests (3.7, ubuntu-latest)
• Unit tests (3.7, macos-latest)
• Unit tests (3.6, windows-latest)
• Unit tests (3.6, ubuntu-latest)
• Unit tests (3.6, macos-latest)
• Unit tests (2.7, windows-latest)
• Unit tests (2.7, ubuntu-latest)
• Unit tests (2.7, macos-latest)

Dependabot will still automatically merge this pull request if you amend it and your tests pass.

[dependabot-preview[bot]]

OK, I won't notify you again about this release, but will get in touch when a new version is available.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.