Add typeof check so it performs better in Javascript

Author: PelayoFelgueroso

packages/lib/src/breadcrumbs/Item.tsx

@@ -48,7 +48,7 @@ const Item = ({ isCurrentPage = false, href, label, onClick }: ItemPropsType) =>
   const currentItemRef = useRef<HTMLSpanElement | null>(null);
 
   const handleOnClick = (event: MouseEvent<HTMLAnchorElement>) => {
-    if (!onClick) return;
+    if (typeof onClick !== "function") return;
     event.preventDefault();
     if (href) onClick(href);
   };