Bump furo from 2020.10.5b9 to 2020.10.13b12 in /docs

[dependabot]

Bumps furo from 2020.10.5b9 to 2020.10.13b12.

Changelog

Sourced from furo's changelog.

Changelog

2020.10.13.beta12

• Fix image link in README, to show up correctly on PyPI.

2020.10.13.beta11

• Tweak colors for dark mode.
• Tweak presentation of <kbd>, to look better in dark mode.

2020.10.13.beta10

• Add dark mode support, based on prefers-color-scheme! 🎉
• Add more information in the documentation (reference and customisation).
• Add sourcemaps in the generated distribution.
• Add support for glossary lists.
• Drop the custom ReadTheDocs-specific CSS.
• Fix bad transparency handling for sidebar hover on Safari.
• Fix shrinking of sidebar brand image on Safari.
• Tweak spacing in admonitions.

2020.10.05.beta9

• Add per-build hashes to asset URLs, to simplify cache invalidation.
• Tweak spacing in API documentation.

2020.09.28.beta8

• Require Sphinx 3.
• Add styling for API documentation.
• Add styling for abbreviations.
• Add clear CSS property for left/right aligned content.
• Add styling to tweak the look of tabs.
• Drop the complexities introduced for custom homepages.
• Tweak color of problematic content.
• Tweak font-size handling for code-blocks.
• Tweak font-size handling for admonitions.
• Tweak spacing around code-blocks.
• Tweak how pages look with announcement and shorter-than-viewport content.
• Tweak styling for lists.
• Fix overlays to correctly show on top of content.
• Restructure sidebar scrolling, to correctly fill viewport.
• Change JS from the basic theme to use blocking network requests.
• Change inline table of contents to look like an error, nudging toward to not using it.

2020.09.15.beta7

• Automate version management
• Use correct width for elements on small screens (100% instead of 100vw)

... (truncated)

Commits

• b16123b Prepare release: 2020.10.13.beta12
• 996f91a Update changelog
• c452bff Update image link in README
• 94ef138 Back to development
• 3f994d7 Prepare release: 2020.10.13.beta11
• 5dd40eb Update changelog
• e7d93e0 Tweak the foreground border color
• d343c43 Update the version in changelog
• c1a7d92 Use the correct stroke color in contents icon
• 44cf6db Drop text-shadow from kbd
• Additional commits viewable in compare view

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