Complete migration to Svelte 4

Author: jerivas

src/lib/components/util/Icon.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import type { SvelteComponent } from 'svelte';
+  import type { ComponentType, SvelteComponent } from 'svelte';
 
   import Check from '$lib/icons/Check.svelte';
   import GitHub from '$lib/icons/GitHub.svelte';
@@ -10,7 +10,7 @@
   import Twitter from '$lib/icons/Twitter.svelte';
   import Warning from '$lib/icons/Warning.svelte';
 
-  const icons: { [key: string]: typeof SvelteComponent } = {
+  const icons: { [key: string]: ComponentType<SvelteComponent> } = {
     check: Check,
     logo: Logo,
     newtab: NewTab,