use pipe syntax for union

Author: Robert Denham

filesender/response_types.py

@@ -1,11 +1,12 @@
-from typing import List, Union
+from __future__ import annotations
+from typing import List
 from typing_extensions import TypedDict
 
 class _FileBase(TypedDict):
     id: int
     transfer_id: int
     name: str
-    size: Union[int, str]  # some FileSender servers return this as a string
+    size: int | str  # some FileSender servers return this as a string
     sha1: str
 
 class _FileWithUid(_FileBase):
@@ -14,7 +15,7 @@ class _FileWithUid(_FileBase):
 class _FileWithPuid(_FileBase):
     puid: str
 
-File = Union[_FileWithUid, _FileWithPuid]
+File = _FileWithUid | _FileWithPuid
 
 class Date(TypedDict):
     raw: int