Fix Creation of dynamic property Warning

Author: goaround

admin/settings-page-network.php

@@ -6,6 +6,8 @@
 
 class NetworkSettingsPage extends SettingsPage {
 
+	protected array $domains;
+
 	public function __construct() {
 		add_action( 'network_admin_menu', [ $this, 'add_plugin_page' ] );
 		add_action( 'admin_init', [ $this, 'page_init' ] );

admin/settings-page-single.php

@@ -6,7 +6,7 @@
 
 class SingleSettingsPage extends SettingsPage {
 
-	protected $domains;
+	protected array $domains;
 
 	public function add_plugin_page() {