Bump reveal.js from 3.9.2 to 4.1.1

[dependabot-preview]

Bumps reveal.js from 3.9.2 to 4.1.1.

Release notes

Sourced from reveal.js's releases.

4.1.1

Mostly bug fixes and enhancements 🐛

Changes

• Adds support for Node.js 16.
• data-background-image now accepts multiple images (#2940).
• New Markdown config option animateLists — automatically turns all lists into stepped fragments (#2956).
• Reduce the tab size in code blocks from 8 to 2.
• More accurate calculation of which slide to jump to when clicking on the progress bar (#2836).
• Optimize DOM interactions and reduce forced layouts when exporting to PDF (#2843).

Fixes

• Video/audio inside of a fragment now stop playing when the fragment is hidden.
• Markdown is now split into individual slides by the default separator (---) as advertised.
• The r-fit-text layout helper now sizes text correctly in PDF exports.
• Fixes an issue where some slide-specific transitions were incorrectly overridden by the global transition setting.
• The has-dark-background helper class now works when using named colors for data-background-color (#2933).

4.1.0

Changes

• New: Add data-visibility="hidden" to a slide to hide it from view. Docs & examples
• New: Add the r-fit-text class to make a text node grow to be as large as possible without overflowing the slide. Docs & examples
• The configured slide width/height is now exposed as CSS variables (--slide-width/--slide-height).
• The shuffle config option now shuffles vertical slides as well.
• All themes now invert the text color based on the current slide background color.
• Include /css and /js in npm package.

Fixes

• Don't append #/ to the URL on first slide.
• Don't fill the progress bar when there's only one slide in a deck
• Correct slide count when using data-visibility="uncounted" (#2675)

4.0.2

Changes

• Enables caching for JavaScript builds, making subsequent builds ~50% faster.
• In auto-sliding presentations, the data-autoslide attribute now takes precedence over automatic detection of <video> durations.
• Remove overzealous reset styles when printing to PDF.
• Reveal.configure and Reveal.isReady are now available in the pre-initialized reveal.js API, to match v3.x behavior.
• Switches to serving demo presentation assets from a CDN.

Bug fixes

• Fixes polyfills and adds IE 11 support.
• Fixes the progress bar direction in right-to-left mode.

4.0.1

Bug fixes

• Fixed issues when printing speaker notes to PDF (#2671 by @​s-l-lee)
• Fixed incorrect auto-animations when there are multiple auto-animated presentations on the same page

4.0.0

... (truncated)

Commits

• 48024a1 4.1.1
• ac410de rebuild assets
• e852e53 npm run build no longer executes tests
• 6fa4f16 roll back yargs
• 395356a update deps & drop node/gulp-sass in order to support node 16 #2959
• 56772af update dependencies
• 632cc78 fix errors when no markdown options are provided #2956
• 2c115b8 Merge pull request #2956 from ryzokuken/plugin-markdown
• 03126c5 Merge branch 'dev' into plugin-markdown
• 00acc73 add animateLists option to markdown plugin
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #833.