fix: resolve CI/CD test failures and linting issues

config_convert/converters/env_converter.py

@@ -2,7 +2,7 @@
 
 import re
 from pathlib import Path
-from typing import Any, Dict, List, Optional
+from typing import Any, Dict, Optional
 
 from config_convert.converters.base import Converter
 from config_convert.utils.type_inference import convert_value