Increase minimum supported WordPress version to 6.4

WordPress 6.4 provides a more modern baseline, with 85.1% of WordPress sites
running 6.4 or later. WP 6.4 drops support for PHP 5.6.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: GaryJones

edit_flow.php

@@ -5,7 +5,7 @@
  * Description: Remixing the WordPress admin for better editorial workflow options.
  * Author: Daniel Bachhuber, Scott Bressler, Mohammad Jangda, Automattic, and others
  * Version: 0.10.0
- * Requires at least: 6.0
+ * Requires at least: 6.4
  * Requires PHP: 8.0
  * License: GPL-3
  * License URI: https://www.gnu.org/licenses/gpl-3.0.html

phpcs.xml.dist

@@ -1,6 +1,8 @@
 <?xml version="1.0"?>
 <ruleset name="Custom ruleset for Edit Flow">
 
+	<config name="minimum_supported_wp_version" value="6.4"/>
+
 	<rule ref="WordPress-Extra"/>
 	<rule ref="WordPress-VIP-Go">
 		<!-- These disallow anonymous functions as action callbacks -->

readme.txt

@@ -2,7 +2,7 @@
 Contributors: batmoo, danielbachhuber, sbressler, automattic
 Donate link: http://editflow.org/contribute/
 Tags: edit flow, workflow, editorial, newsroom, management, journalism, post status, custom status, notifications, email, comments, editorial comments, usergroups, calendars, editorial calendar, story budget
-Requires at least: 6.0
+Requires at least: 6.4
 Requires PHP: 8.0
 Tested up to: 6.5
 Stable tag: 0.9.9