Issue #3331498: Fix PHPCS errors and warnings

src/Field/FieldSettings.php

 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Drupal\erg\Field;
 
@@ -12,7 +12,18 @@ use Drupal\erg\Guard\GuardInterface;
  */
 final class FieldSettings {
 
+  /**
+   * The guards.
+   *
+   * @var array
+   */
   private $guards = [];
+
+  /**
+   * The weight.
+   *
+   * @var int
+   */
   private $weight = 0;
 
   /**