Fix eslint error and update svelte related stuff

apps/website/src/app.d.ts

@@ -57,7 +57,7 @@ declare interface smoothScrollOptions {
     hash: string
     changeHash?: boolean
     event?: MouseEvent
-    callback?: Function
+    callback?: () => void
 }
 
 
@@ -87,4 +87,4 @@ declare type TransitionOptions = {
     stagger?: number
     delay?: number
     easing?: string | Easing
-}
+}