NUglify cannot minify CSS in Umbraco v9, throws error.

[JasonElkin]

vendr.css does not minify in Umbraco v9 (and throws an error)

Steps To Reproduce

1. Install in a new v9 site.
2. Set Umbraco debug to false in appsettings
3. Load backoffice
4. CSS bundle throws the error:

"InvalidOperationException: Expected identifier, found '>',Expected comma or open brace, found ')'"

Because of this issue with Smidge the error also causes JS to fail to load.

Expected behavior
CSS minifies and loads.

Vendr version:
2.0.3

The failing CSS in question is line 75 of vendr.css:

.matryoshka-tabs-list-wrapper:has(> .matryoshka-tabs-list > .matryoshka-tab-link:first-child + .matryoshka-tab-link[data-element="tab-vendr_variants"]) {
    display: none !important;
}

NUglify cannot handle it (have tested using Nuglify directly).

[mattbrailsford]

Ordinarily I'd say that this is really an issue for NUglify to fix as this is valid CSS, however, given this is Vendr v2 which only supports Umbraco v9 and Umbraco v8.17+ which both have the new tabs implementation, I think it actually makes sense for us to remove this style anyway as nobody would really be using Matroyshka in either of those two versions.

[JasonElkin]

@mattbrailsford that's what I was hoping you'd say. Will still raise it as a bug with NUglify.

[mattbrailsford]

@JasonElkin there is a new 2.0.4-beta005 on the unstable feed if you want to try that

[JasonElkin]

Thanks @mattbrailsford that's fixed it for our testing site.