add "Requires Plugins" to plugin headers

The headers will be supported with WordPress 6.5. The dependency on
"statify" was present from the start, so this just adds another layer
of convenience for users on WP 6.5 or later.

statify-blacklist.php

@@ -11,6 +11,9 @@
  * Plugin URI:        https://wordpress.org/plugins/statify-blacklist/
  * Description:       Extension for the Statify plugin to add customizable filters. (formerly "Statify Blacklist)
  * Version:           1.7.0
+ * Requires at least: 4.7
+ * Requires PHP:      5.5
+ * Requires Plugins:  statify
  * Author:            Stefan Kalscheuer (@stklcode)
  * Author URI:        https://www.stklcode.de
  * Text Domain:       statify-blacklist