Common CSS: Deprecated Usage of @import

[texttechne]

Describe the bug
When using the raw scss files of the common css package, SASS will show deprecation warnings:

Deprecation Warning: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0. More info and automated migrator: https://sass-lang.com/d/import

We're using this in the context of React and sass-embedded.

To Reproduce
For us it boils down to having a _base.scss file with the following content:

@forward "@sap-ui/common-css/dist/sass/common-mixins";

And within the common-mixins there's the following statement @import "common-variables";

Expected behavior
No deprecation warnings. Project conforms to best practices of SASS.