fix mypy errors

src/gphotos_sync/GoogleAlbumsSync.py

@@ -4,7 +4,7 @@
 import shutil
 from datetime import datetime
 from pathlib import Path
-from typing import Callable, Dict, Tuple
+from typing import Callable, Dict, Optional, Tuple
 
 from gphotos_sync.Checks import get_check
 
@@ -68,7 +68,9 @@ def __init__(
         self.path_format = settings.path_format
 
     @classmethod
-    def make_search_parameters(cls, album_id: str, page_token: str = None) -> Dict:
+    def make_search_parameters(
+        cls, album_id: str, page_token: Optional[str] = None
+    ) -> Dict:
         body = {"pageToken": page_token, "albumId": album_id, "pageSize": PAGE_SIZE}
         return body
 

src/gphotos_sync/Main.py

@@ -451,7 +451,7 @@ def fs_checks(root_folder: Path, args):
 
         return args
 
-    def main(self, test_args: dict = None):
+    def main(self, test_args: Optional[dict] = None):
         start_time = datetime.now()
         args = self.parser.parse_args(test_args)  # type: ignore