Update tested version to WordPress 7.0

Author: vytisbulkevicius

readme.txt

@@ -2,7 +2,7 @@
 Contributors: optimole
 Tags: image optimization, optimize images, compress images, webp, avif
 Requires at least: 5.5
-Tested up to: 6.9
+Tested up to: 7.0
 Requires PHP: 7.4
 Stable tag: 4.2.5
 License: GPLv3