Update minimum supported WordPress version and tested version

The minimum supported WordPress version has been lowered to 6.3, and the WP version that the plugin is tested up to has been updated to 6.4. These changes reflect across wp-404-caching.php file, .phpcs.xml configuration file and the README.md file.

.phpcs.xml

@@ -30,7 +30,7 @@
   <exclude-pattern>vendor/</exclude-pattern>
 
   <!-- The version set here matches the minimum version tested in buddy.yml. -->
-  <config name="minimum_supported_wp_version" value="6.4" />
+  <config name="minimum_supported_wp_version" value="6.3" />
 
   <!-- Define the prefixes that can be used by the plugin -->
   <rule ref="WordPress.NamingConventions.PrefixAllGlobals">

README.md

@@ -12,8 +12,8 @@ A WordPress plugin to provide full page caching for 404 pages, improving perform
 ## Requirements
 - SSL enabled on the website.
 - An external object cache setup (e.g., Redis, Memcached).
-- Requires at least: 6.4
-- Tested up to: 6.5
+- Requires at least: 6.3
+- Tested up to: 6.4
 - Requires PHP: 8.1
 - License: GPL v2 or later
 

wp-404-caching.php

@@ -6,8 +6,8 @@
  * Version: 1.0.1
  * Author: Alley
  * Author URI: https://github.com/alleyinteractive/wp-404-caching
- * Requires at least: 6.4
- * Tested up to: 6.5
+ * Requires at least: 6.3
+ * Tested up to: 6.4
  *
  * Text Domain: wp-404-caching
  * Domain Path: /languages/