Enforce modern typing (#258)

* Allow UP

* Upgrade typing

* test smolagents

* Change to contextlib

---------

Co-authored-by: Marcus Valtonen Örnhag <marcus.valtonen.ornhag@ericsson.com>

backend/fastrtc/reply_on_pause.py

@@ -1,9 +1,10 @@
 import asyncio
 import inspect
+from collections.abc import AsyncGenerator, Callable, Generator
 from dataclasses import dataclass, field
 from logging import getLogger
 from threading import Event
-from typing import Any, AsyncGenerator, Callable, Generator, Literal, cast
+from typing import Any, Literal, cast
 
 import numpy as np
 from numpy.typing import NDArray