Fix import and update async timeout (#347)

src/brussel/brussel.py

@@ -5,19 +5,15 @@
 import socket
 from dataclasses import dataclass
 from importlib import metadata
-from typing import TYPE_CHECKING, Any, cast
+from typing import Any, Self, cast
 
-import async_timeout
 from aiohttp import ClientError, ClientSession
 from aiohttp.hdrs import METH_GET
 from yarl import URL
 
 from .exceptions import ODPBrusselConnectionError, ODPBrusselError
 from .models import DisabledParking, Garage
 
-if TYPE_CHECKING:
-    from typing_extensions import Self
-
 
 @dataclass
 class ODPBrussel:
@@ -71,7 +67,7 @@ async def _request(
             self._close_session = True
 
         try:
-            async with async_timeout.timeout(self.request_timeout):
+            async with asyncio.timeout(self.request_timeout):
                 response = await self.session.request(
                     method,
                     url,