title: Sass Loader Error: Invalid options object. Stylus Loader has been initialized using an options object that does not match the API schema
body: <p>I'm getting this error after running npm run serve:</p>
  <pre><code>in ./src/components/site-checker/insert-model.vue?vue&amp;type=style&amp;index=0&amp;lang=stylus&amp;
  
  Syntax Error: ValidationError: Invalid options object. Stylus Loader has been initialized using an options object that does not match the API schema.
   - options has an unknown property 'preferPathResolver'. These properties are valid:
     object { stylusOptions?, sourceMap?, webpackImporter?, additionalData? }
  </code></pre>
  <hr />
  <p>I'm using VueJS with this framework:</p>
  <p>[Vue 2] babel, router, vuex
  Vue CLI v4.5.8</p>