add property into Attribute model

Author: milwad-dev

src/Attribute.php

@@ -4,6 +4,12 @@
 
 use Illuminate\Database\Eloquent\Model;
 
+/**
+ * @property string $title
+ * @property string $value
+ * @property string $attributable
+ * @property string|int $attributable_id
+ */
 class Attribute extends Model
 {
     protected $guarded = [];