Port to Deno

[catuhana]

Usage and everything else is the exactly same, and Node is still supported via dnt.

[catuhana]

Well, that aged like milk. I've learned that dnt doesn't yet support specifying peer dependencies or whatsoever, and it directly uses the @unocss/core dependency for some reason (when it should be stripped, since its types are only used in development, it's not needed anywhere else). And since this plugin possibly supports unocss>=0.51.0, it would be better to bring back CJS, old Node support and add unocss as peer dependency.