Update to @asciidoctor/reveal.js 5.x

[migueltercero]

Can you update dependencies to work with last version of @asciidoctor/reveal.js 5.x released last year?

Thanks.

[flobilosaurus]

Hi @migueltercero, currently im waiting for "asciidoctor-vscode" extension to fix an error because my extension fails loading if asciidoctor-vscode is active besides it. As soon as i know how to handle it, i will continue developing my extension.
For further references see: asciidoctor/asciidoctor-vscode#881