refactor: use $$restProps API

- add ref prop for applicable components (#196)
- add slot to Content Switcher `Switch` component (#183)
- remove fillArray, css utilities

src/components/Pagination/Pagination.Skeleton.svelte

@@ -1,25 +1,21 @@
 <script>
-  let className = undefined;
-  export { className as class };
-  export let style = undefined;
-
-  import { cx } from '../../lib';
-  import SkeletonText from '../SkeletonText';
+  import { SkeletonText } from "../SkeletonText";
 </script>
 
 <div
+  class:bx--pagination={true}
+  class:bx--skeleton={true}
+  {...$$restProps}
   on:click
   on:mouseover
   on:mouseenter
-  on:mouseleave
-  class={cx('--pagination', '--skeleton', className)}
-  {style}>
-  <div class={cx('--pagination__left')}>
+  on:mouseleave>
+  <div class:bx--pagination__left={true}>
     <SkeletonText width="70px" />
     <SkeletonText width="35px" />
     <SkeletonText width="105px" />
   </div>
-  <div class={cx('--pagination__right', '--pagination--inline')}>
+  <div class:bx--pagination__right={true} class:bx--pagination--inline={true}>
     <SkeletonText width="70px" />
   </div>
 </div>