Add missing import

src/diepvries/deserializers/snowflake_deserializer.py

@@ -5,7 +5,7 @@
 from collections import defaultdict
 from dataclasses import asdict, dataclass
 from functools import cached_property
-from typing import Dict, List, Optional, Type
+from typing import Dict, List, Literal, Optional, Type
 
 from snowflake.connector import DictCursor, connect