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)