Bump furo from 2020.12.30b24 to 2021.2.21b25

[dependabot[bot]]

Bumps furo from 2020.12.30b24 to 2021.2.21b25.

Changelog

Sourced from furo's changelog.

Changelog

2021.02.21.beta25

• Document how to inject custom code in Sphinx documentation
• Document that pygments_dark_style is Furo-specific
• Make sphinx-panels respond to dark mode with Furo
• Stop defering Javascript, which was causing search to break in some cases.

2020.12.30.beta24

• Disable environment caching if pygments_dark_style is changed.
• Revert to earlier background color for inline literals, and allow configuring it via a CSS variables.

2020.12.28.beta23

• Fix code-block overflow issue, introduced by the fix for sphinx-copybutton compatibility.
• Tweak horizontal rules, to always be 1px tall.
• Tweak background color for inline literals, to match code blocks.

2020.12.28.beta22

• MAJOR: Move theme files into a "furo" folder.
  • This affects any users deriving from furo's templates.
• Add (custom) support for pygments_dark_style.
• Add support for genindex pages.
  • Note that html_split_index is not supported at this time.
• Add support for highlighting API elements, when accessed via "#hash" in URL.
• Add language_data.js to search page, fixing Stemmer related failures in Sphinx 3.4.
• Document how to add a site-wide announcement.
• Fix sphinx-copybutton placement on scrollable code blocks.
• Generate an error page, for documents using layout.html from Sphinx's basic theme.
• Translate placeholder in sidebar's search.
• Tweak how additional h1 headings are handled in ToC sidebar.
• Update dependency constraints, limiting compatibility to Sphinx 3.x versions.

2020.12.09.beta21

• Rebuild theme assets, for main release.

2020.12.09.beta20

• Clarify expectations around sidebar customisation.
• Declare plugin information to pacify Sphinx's "are you parallel" check.
• Disable sidebar-follows-you-as-you-scroll Javascript.
• Fix scrollbar styles affecting document body.
• Tweak colors for problematic content.
• Tweak how words wrap in sidebar title.
• Tweak spacing in API documentation.

... (truncated)

Commits

• 31682dc Prepare release: 2021.02.21.beta25
• 6973dcb Update changelog
• 963a9af Change to newer prettier mirror for pre-commit
• f46cfa3 Remove unused import
• d284f77 Make sphinx-panels respond to dark mode
• 3bc639c Document that pygments_dark_style is Furo-specific
• 07cec3f Add documentation for how to inject custom code
• 38632ad Nobody saw this typo
• 89fc6a4 Move JS script handling to the end
• b37c525 Stop defering JS tags
• Additional commits viewable in compare view

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Superseded by #275.