Bump reveal.js from 3.9.2 to 4.0.0

[dependabot-preview]

Bumps reveal.js from 3.9.2 to 4.0.0.

Release notes

Sourced from reveal.js's releases.

4.0.0

Breaking Changes 🚨

This release includes a small number of breaking changes. Please read the Upgrade Instructions if you want to migrate an existing presentation.

Highlights

• New website, docs and logo! https://revealjs.com/ 🚀
• Auto-Animate lets you create complex animations by automatically transitioning between matched elements across slides. Duration, delay and easing can be set on a per-slide or per-element basis.
• We now support multiple presentations on the same page.
  • This also introduces a new embedded config option, which allows presentations to reside within a portion of a page. Previously reveal.js always covered 100% of the page width and height.
  • The new keyboardCondition: 'focused' config option lets presentations capture keyboard events only when they're focused by the viewer.
• The reveal.js core and built-in plugins have been rewritten as ES modules. This makes the project easier to maintain and makes reveal.js itself easier to include in a bundle. Two bundles are provided:
  • dist/reveal.js uses UMD and has broad cross browser support (ES5).
  • dist/reveal.esm.js is an ES module. More info
• Code highlights are now automatically scrolled into view and it looks soooo good. You've got to try it out.

Changes

• The Reveal.initialize method now returns a promise that resolves once reveal.js is ready and all plugins have finished initializing.
• Switches build systems from to gulp, using rollup for bundling.
• Moves all compiled CSS (reveal.css, reset.css and themes) from css/ to dist/. See Upgrade Instructions.
• Moves all print CSS into reveal.js. The old script-based print styles can be removed. by @quilicicf
• Adds a new slidetransitionend event.
• Adds a new r-stack layout helper for placing elements on top of each other.
• Adds support for data-visibility="uncounted" to exclude slides from the progress bar and slide number count. #2543 by @lassepe
• Adds Reveal.getComputedSlideSize API method.
• Renames the Reveal.addEventListener and Reveal.removeEventListener API methods to Reveal.on and Reveal.off. Old names are aliased for backwards compatibility.
• Removes the default border style from <img>s. Can be added with the r-frame class.
• Removes bower.json.

Plugins

• New syntax for registering plugins.
• All built-in plugins—such as markdown and highlight—are now available as ES modules. More info
• Notes: No longer depends on resolving an external notes.html file to work. Everything is baked into the plugin JS.
• Highlight: Upgraded to highlight.js 10.0.1.
• Highlight: Moved highlight themes from lib/css/monokai.css to plugin/highlight/monokai.css.
• Highlight: 'highlight.js' library is now installed from npm instead of being saved in the repo.
• Markdown: Support for line numbers and highlights in syntax highlighted code.
• Markdown: Support for boolean data- attributes. by @Bagira80
• Markdown: 'marked' library is now installed from npm instead of being saved in the repo.
• Multiplex: Moved out to https://github.com/reveal/multiplex
• Notes Server: Moved out to https://github.com/reveal/notes-server

Bug fixes

• Fixes a bug that prevented links from working in exported PDFs. #2628 by @telliott22
• Fixes a bug where navigationMode: 'linear' incorrectly hid valid vertical directions. #2582 by @earboxer
• Fixes an issue that caused reveal.js to incorrectly block keyboard events when an element with contentedtable=false was focused. #2650

Commits

• f0b67ad 4.0.0
• 38eda3a fix livereload
• df61f9e progress bar width set via scale instead of width for perf
• 5e49cbd link fix
• 8b3f57b Merge pull request #2666 from RealCyGuy/patch-1
• 07db418 fixed links
• a1f03cb Reveal.VERSION is now available prior to initialization #2651
• feb43ff rollup cache saves 1s per js build
• 84b5298 update dependencies
• 4f22933 reveal.netlify.app -> revealjs.com
• Additional commits viewable in compare view

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Superseded by #499.