fix(typescript): add debounced.cancel() method to return type (quasarframework#6881)

* fix(typescript): add debounced.cancel() method to return type

* fix(typo): added type intersection to wrong method

Author: hamiltoes

ui/types/utils.d.ts

@@ -11,7 +11,7 @@ export function debounce<F extends (...args: any[]) => any>(
   fn: F,
   wait?: number,
   immediate?: boolean
-): F;
+): F & { cancel(): void };
 export function exportFile(
   fileName: string,
   rawData: BlobPart,