fix: do not use asyncio's timeout lib before 3.11.2 (#2659)

There's an issue in asyncio's timeout lib before 3.11.3 that causes
async calls to raise `CancelledError`.

This is a cpython issue that was fixed in this commit [1] and
cherry-picked to previous versions, meaning 3.11.3 will work correctly.

Check [2] for more info.

[1] python/cpython@04adf2d
[2] #2633

redis/asyncio/connection.py

@@ -25,7 +25,9 @@
 )
 from urllib.parse import ParseResult, parse_qs, unquote, urlparse
 
-if sys.version_info.major >= 3 and sys.version_info.minor >= 11:
+# the functionality is available in 3.11.x but has a major issue before
+# 3.11.3. See https://github.com/redis/redis-py/issues/2633
+if sys.version_info >= (3, 11, 3):
     from asyncio import timeout as async_timeout
 else:
     from async_timeout import timeout as async_timeout

setup.py

@@ -34,7 +34,7 @@
     install_requires=[
         'importlib-metadata >= 1.0; python_version < "3.8"',
         'typing-extensions; python_version<"3.8"',
-        'async-timeout>=4.0.2; python_version<"3.11"',
+        'async-timeout>=4.0.2; python_version<="3.11.2"',
     ],
     classifiers=[
         "Development Status :: 5 - Production/Stable",

tests/test_asyncio/test_pubsub.py

@@ -5,7 +5,9 @@
 from typing import Optional
 from unittest.mock import patch
 
-if sys.version_info.major >= 3 and sys.version_info.minor >= 11:
+# the functionality is available in 3.11.x but has a major issue before
+# 3.11.3. See https://github.com/redis/redis-py/issues/2633
+if sys.version_info >= (3, 11, 3):
     from asyncio import timeout as async_timeout
 else:
     from async_timeout import timeout as async_timeout