Fix hyperopt-loss interface to enforce kwargs

freqtrade/optimize/hyperopt_loss_interface.py

@@ -19,11 +19,11 @@ class IHyperOptLoss(ABC):
 
     @staticmethod
     @abstractmethod
-    def hyperopt_loss_function(results: DataFrame, trade_count: int,
+    def hyperopt_loss_function(*, results: DataFrame, trade_count: int,
                                min_date: datetime, max_date: datetime,
                                config: Dict, processed: Dict[str, DataFrame],
                                backtest_stats: Dict[str, Any],
-                               *args, **kwargs) -> float:
+                               **kwargs) -> float:
         """
         Objective function, returns smaller number for better results
         """