Append count in parentheses to each menu item on menu of WooCommerce Product Categories

functions.php

<?php
//add the count to our shop menu items
function nim_menu_item_count( $items, $menu, $args ) {

	// Only proceed if we are looking at the correct menu and not in the admin
	if ( $menu->slug != 'your-menu-slug' || is_admin() )
		return $items;

	//grab each menu item and it's object_id (which ends up being the category ID for the product category)
	foreach ($items as $item) {

		$cat_terms = get_terms( 'product_cat', array( 'include'=>$item->object_id ) );

		//tack the count on to the title if it's not zero
		if ( $cat_terms[0]->count != 0 )
			$item->title .= '('.$cat_terms[0]->count.')';
	}
	return $items;
}
add_filter( 'wp_get_nav_menu_items', 'nim_menu_item_count', 10, 3 );