fix from_date and to_date for est_employee

apps/establishment/serializers/common.py

@@ -202,7 +202,7 @@ class EstablishmentEmployeeCreateSerializer(serializers.ModelSerializer):
         """Meta class."""
 
         model = models.EstablishmentEmployee
-        fields = ('id',)
+        fields = ('id', 'from_date', 'to_date')
 
     def _validate_entity(self, entity_id_param: str, entity_class):
         entity_id = self.context.get('request').parser_context.get('kwargs').get(entity_id_param)