add history of changes to all entitys

backend/modules/holiday/models/Holiday.php

@@ -4,5 +4,12 @@ namespace backend\modules\holiday\models;
 
 class Holiday extends \common\models\Holiday
 {
-
+    public function behaviors()
+    {
+        return [
+            'log' => [
+                'class' => \common\behaviors\LogBehavior::class,
+            ]
+        ];
+    }
 }