division without calc() deprecated in Dart Sass
```
Deprecation Warning: Using / for division outside of calc() is deprecated and will be removed in Dart Sass 2.0.0.

Recommendation: math.div(30em, 14) or calc(30em / 14)

More info and automated migrator: https://sass-lang.com/d/slash-div

   ╷
12 │ $fa-li-width:         (30em / 14) !default;
   │                        ^^^^^^^^^
   ╵
    node_modules/fork-awesome/scss/_variables.scss 12:24   @import
    node_modules/fork-awesome/scss/fork-awesome.scss 15:9  @import
    src/style.scss 2:9                                     root stylesheet
```

