Don't depend on async-timeout for Python 3.11+.

This library was upstreamed into the standard library and is thus
deprecated.

Author: Romain-Geissler-1A

hole/__init__.py

@@ -4,7 +4,11 @@
 import socket
 
 import aiohttp
-import async_timeout
+import sys
+if sys.version_info >= (3, 11):
+    import asyncio as async_timeout
+else:
+    import async_timeout
 
 from . import exceptions
 

setup.py

@@ -21,7 +21,7 @@
     license="MIT",
     install_requires=[
         "aiohttp<4",
-        "async_timeout>4,<5",
+        "async_timeout; python_version < \"3.11\"",
     ],
     packages=["hole"],
     python_requires=">=3.9",