Use PHP 7.4 featers and PHP 8 polyfills

views/checkout/fields/field-checkbox-multi.php

@@ -16,9 +16,9 @@
 	 */
 	wu_get_template(
 		'checkout/fields/partials/field-title',
-		array(
+		[
 			'field' => $field,
-		)
+		]
 	);
 
 	?>
@@ -44,9 +44,9 @@
 	 */
 	wu_get_template(
 		'checkout/fields/partials/field-errors',
-		array(
+		[
 			'field' => $field,
-		)
+		]
 	);
 
 	?>