fix(deps): update dependency reveal.js to v5.2.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
reveal.js (source)	5.1.0 -> 5.2.1

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Release Notes

hakimel/reveal.js (reveal.js)

v5.2.1

Compare Source

Lightbox bug fixes and improvements

• Prevent reveal.js keyboard shortcuts while lightbox is open (@​tobi-or-not-tobi in https://github.com/hakimel/reveal.js/pull/3767)
• Opening iframe lightboxes via [data-preview-link] now works all element types, not just <a> (@​hakimel)
• Lightbox state is now persisted/restored when calling Reveal.getState and Reveal.setState (@​hakimel)
• Lightbox now syncs between speaker view and main window (@​hakimel)
• Fix pause overlay/lightbox layering conflict (@​tobi-or-not-tobi in https://github.com/hakimel/reveal.js/pull/3768)
• Added lightbox example to demo.html

Full Changelog: hakimel/reveal.js@5.2.0...5.2.1

v5.2.0

Compare Source

New Feature: Lightbox

Any element in your presentation can now be turned into an image/video lightbox trigger. Clicking reveals a full-size lightbox overlay where users can view your image or video. This is great for things like clickable thumbnails in a gallery.

<!-- Click to show "A.png" in an overlay -->
<img src="A.png" data-preview-image>

<!-- Click show "B.png" in an overlay -->
<img src="A.png" data-preview-image="B.png">

<!-- Click to show "C.mp4" in an overlay and scale it to "cover" -->
<img src="A.png" data-preview-video="C.mp4" data-preview-fit="cover">

<!-- Works with any element type -->
<button data-preview-video="C.mp4">Play video</button>

Docs: revealjs.com/lightbox.

Here's what it looks like in action:

lightbox.mp4

Changes

• Upgrade to gulp 5.0.
• Add controls: "speaker-only" config option for only showing controls in speaker view (@​gpotter2 in https://github.com/hakimel/reveal.js/pull/3716)
• Extend search API to include closeSearch and toggleSearch (@​lechten in https://github.com/hakimel/reveal.js/pull/3685)
• Automatic source code spellcheck via GitHub action (@​yarikoptic in https://github.com/hakimel/reveal.js/pull/3602)
• Math plugin now ignores code tags by default (@​hakimel in 0d02d8a)
• Muted background videos now autoplay in the speaker view.
• Prevent initialize from being called twice (@​hakimel in 16ac4b0)
• Auto-animate no longer skips matching fragments on adjacent slides (@​hakimel in 6dea2a5)

Bug fixes

• Fix reveal.js not covering full viewport height in iOS by switching to 100dvh (@​hakimel in 6cebb77)
• Fix background video restarting when switching fragments from notes view (https://github.com/hakimel/reveal.js/issues/3633)
• Fix gulp package not working in gulp 5 (@​dennybiasiolli in https://github.com/hakimel/reveal.js/pull/3701)
• Fix last slide not triggering slidechange event in scroll view (@​hakimel in fe4a6e8)

Full Changelog: hakimel/reveal.js@5.1.0...5.2.0

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