Fix incorrect type hinting in drush rex command.

reinstall.drush.inc

@@ -29,7 +29,7 @@ function reinstall_drush_command() {
  * @param array $bundles
  *   An array of bundle names to export.
  */
-function drush_reinstall_export($entity_type = NULL, array ...$bundles) {
+function drush_reinstall_export($entity_type = NULL, ...$bundles) {
 
   /** @var \Drupal\reinstall\Dumper $dumper */
   $dumper = \Drupal::service('reinstall.dumper');