Use TypeScript's `ResizeObserver` types instead of `any`

ts/hooks/useHasWrapped.ts

@@ -40,10 +40,7 @@ export function useHasWrapped<T extends HTMLElement>(): [Ref<T>, boolean] {
       return noop;
     }
 
-    // We can remove this `any` when we upgrade to TypeScript 4.2+, which adds
-    //   `ResizeObserver` type definitions.
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const observer = new (window as any).ResizeObserver(() => {
+    const observer = new ResizeObserver(() => {
       setHasWrapped(isWrapped(element));
     });
     observer.observe(element);