Add 3.8 block for strategyUpdater

freqtrade/commands/strategy_utils_commands.py

@@ -1,4 +1,5 @@
 import logging
+import sys
 import time
 from pathlib import Path
 from typing import Any, Dict
@@ -19,6 +20,9 @@ def start_strategy_update(args: Dict[str, Any]) -> None:
     :return: None
     """
 
+    if sys.version_info == (3, 8):  # pragma: no cover
+        sys.exit("Freqtrade strategy updater requires Python version >= 3.9")
+
     config = setup_utils_configuration(args, RunMode.UTIL_NO_EXCHANGE)
 
     strategy_objs = StrategyResolver.search_all_objects(