Even more migrations to mautrix-python

mautrix_telegram/util/__init__.py

@@ -1,7 +1,10 @@
+from asyncio import Future
+
 from .file_transfer import transfer_file_to_matrix, convert_image
 from .format_duration import format_duration
 from .signed_token import sign_token, verify_token
 from .recursive_dict import recursive_del, recursive_set, recursive_get
 
-def ignore_coro(coro):
+
+def ignore_coro(_: Future) -> None:
     pass