Svelte warnings

```
https://evilmartians.com/chronicles/postcss-8-plugin-migration
warn - The `@variants` directive has been deprecated in Tailwind CSS v3.0.
warn - Use `@layer utilities` or `@layer components` instead.
warn - https://tailwindcss.com/docs/upgrade-guide#replace-variants-with-layer
4:45:44 PM [vite-plugin-svelte] /tmp/tmp2ozihorl/kit/src/lib/Dropdown.svelte:11:11 Dropdown has unused export property 'selectedValue'. If it is for external reference only, please consider using `export const selectedValue`
9: export let menuClassNames = "";
10: export let noBtnClass = void 0;
11: export let selectedValue = void 0;
^
12: export let useDeprecatedJS = true;
13: export let withBtnCaret = false;
4:45:51 PM [vite-plugin-svelte] /tmp/tmp2ozihorl/kit/src/lib/Dropdown.svelte:11:11 Dropdown has unused export property 'selectedValue'. If it is for external reference only, please consider using `export const selectedValue`
9: export let menuClassNames = "";
10: export let noBtnClass = void 0;
11: export let selectedValue = void 0;
```