Update README.md

Bump version and Woocommerce tested version.
https://developer.woocommerce.com/2023/05/10/woocommerce-7-7-released/

Author: lukecav

README.md

@@ -30,6 +30,9 @@ Run ```composer require lukecav/performance-improvements-for-woocommerce```
 
 ## Changelog
 
+**1.1.19**
+* Bump WooCommerce tested version.
+
 **1.1.18**
 * Bump WooCommerce tested version.