Simplify bundle price identification

#439 (comment)

Co-authored-by: martynmjones <40762232+martynmjones@users.noreply.github.com>

includes/class-wc-abstract-google-analytics-js.php

@@ -233,7 +233,7 @@ public function get_formatted_product( WC_Product $product, $variation_id = 0, $
 		// Integration with Product Bundles.
 		// Get the minimum price, as `get_price` may return 0 if the product is a bundle and the price is potentially a range.
 		// Even a range containing a single value.
-		if ( class_exists( '\WC_Product_Bundle' ) && $product instanceof WC_Product_Bundle && is_callable( [ $product, 'get_bundle_price' ] ) ) {
+		if ( $product->is_type( 'bundle' ) && is_callable( [ $product, 'get_bundle_price' ] ) ) {
 			$price = $product->get_bundle_price( 'min' );
 		}