Update readme.txt

Update the version and changelog.

Author: lukecav

readme.txt

@@ -3,9 +3,9 @@ Contributors: lukecav
 Tags:  woocommerce, performance, dashboard, orders, widgets, disable
 Requires at least: 7.2
 Tested up to: 5.6
-WC tested up to: 7.5
+WC tested up to: 7.6
 Requires PHP: 7.4
-Stable tag: 1.1.17
+Stable tag: 1.1.18
 License: GPLv2 or later
 
 Performance tweaks for the front-end and back-end of a store.
@@ -29,6 +29,9 @@ Performance tweaks related to orders on the front-end and the back-end of a stor
 
 == Changelog ==
 
+= 1.1.18 =
+Bump WooCommerce tested version.
+
 = 1.1.17 =
 Disable the Payment Gateway Admin Suggestions.