Possibly outdated information in the `add` docs

In the [add docs](https://hyperscript.org/commands/add/) it says

> Note: Hyperscript supports hyphens in object property names, so you can write add { font-size: '2em' }. However, double hyphens (--) mark comments in hyperscript, so if you need to use them for [CSS Custom Properties][], use quotes -- add { '--big-font-size': '2em' }.

But in the 0.8.4 release notes it says:

> Comments now require two dashes and a space, like so: -- , which enables double dashes in class literals like so: add .foo--bar

So I guess the note can be removed, right?
Happy to open a PR if that's the case

PS: I'm also happy to add a note on using class names with a dash in them, as is frequent with TailwindCSS utilities. (`.{'foo-bar'}`)