Bump version to 6.0.0

Author: otarhe

pressable-cache-management.php

@@ -4,7 +4,7 @@
 Description:  Pressable cache management made easy
 Plugin URI:   https://pressable.com/knowledgebase/pressable-cache-management-plugin/#overview
 Author:       Pressable CS Team
-Version:      5.9.9
+Version:      6.0.0
 Requires at least: 5.0
 Tested up to: 6.7
 Requires PHP: 7.4