fix the warning (#1656)

Author: Andyli1007

scripts/dump_bin.py

@@ -135,7 +135,7 @@ def _get_date(
 
     def _get_source_data(self, file_path: Path) -> pd.DataFrame:
         df = pd.read_csv(str(file_path.resolve()), low_memory=False)
-        df[self.date_field_name] = df[self.date_field_name].astype(str).astype(np.datetime64)
+        df[self.date_field_name] = df[self.date_field_name].astype(str).astype("datetime64[ns]")
         # df.drop_duplicates([self.date_field_name], inplace=True)
         return df
 
@@ -195,7 +195,7 @@ def save_instruments(self, instruments_data: Union[list, pd.DataFrame]):
     def data_merge_calendar(self, df: pd.DataFrame, calendars_list: List[pd.Timestamp]) -> pd.DataFrame:
         # calendars
         calendars_df = pd.DataFrame(data=calendars_list, columns=[self.date_field_name])
-        calendars_df[self.date_field_name] = calendars_df[self.date_field_name].astype(np.datetime64)
+        calendars_df[self.date_field_name] = calendars_df[self.date_field_name].astype("datetime64[ns]")
         cal_df = calendars_df[
             (calendars_df[self.date_field_name] >= df[self.date_field_name].min())
             & (calendars_df[self.date_field_name] <= df[self.date_field_name].max())