Fix type errors introduced in #201

Author: kislyuk

watchtower/__init__.py

@@ -11,7 +11,7 @@
 from collections.abc import Mapping
 from datetime import date, datetime, timezone
 from operator import itemgetter
-from typing import Any, Callable, List, Optional, Tuple
+from typing import Any, Callable, Dict, List, Optional, Tuple
 
 import boto3
 import botocore
@@ -213,7 +213,7 @@ def __init__(
         boto3_client: botocore.client.BaseClient = None,
         boto3_profile_name: Optional[str] = None,
         create_log_group: bool = True,
-        log_group_tags: dict[str, str] = {},
+        log_group_tags: Dict[str, str] = {},
         json_serialize_default: Optional[Callable] = None,
         log_group_retention_days: Optional[int] = None,
         create_log_stream: bool = True,