Clarify that asynchronous handler is only supported for Python versions 3.9 and 3.10

Author: max-ipinfo

README.md

@@ -69,6 +69,8 @@ New York City
 Internally the library uses `aiohttp`, but as long as you provide an event
 loop (as in this example via `asyncio`), it shouldn't matter.
 
+NOTE: due to API changes in the `asyncio` library, the asynchronous implementation only supports Python version 3.9 and 3.10.
+
 ### Usage
 
 The `Handler.getDetails()` method accepts an IP address as an optional, positional argument. If no IP address is specified, the API will return data for the IP address from which it receives the request.

requirements.txt

@@ -14,7 +14,7 @@ async-timeout==4.0.2
     # via aiohttp
 attrs==22.1.0
     # via aiohttp
-backports-asyncio-runner==1.2.0
+backports-asyncio-runner==1.2.0; python_version < "3.11"
     # via pytest-asyncio
 black==22.6.0
     # via -r requirements.in

tests/handler_async_test.py

@@ -1,5 +1,6 @@
 import json
 import os
+import sys
 
 from ipinfo.cache.default import DefaultCache
 from ipinfo.details import Details
@@ -11,6 +12,8 @@
 import pytest
 import aiohttp
 
+skip_if_python_3_11_or_later = sys.version_info >= (3, 11)
+
 
 class MockResponse:
     def __init__(self, text, status, headers):
@@ -195,6 +198,7 @@ def _check_batch_details(ips, details, token):
             assert "domains" in d
 
 
+@pytest.mark.skipif(skip_if_python_3_11_or_later, reason="Requires Python 3.10 or earlier")
 @pytest.mark.parametrize("batch_size", [None, 1, 2, 3])
 @pytest.mark.asyncio
 async def test_get_batch_details(batch_size):
@@ -225,6 +229,7 @@ async def test_get_iterative_batch_details(batch_size):
         _check_iterative_batch_details(ips, details, token)
 
 
+@pytest.mark.skipif(skip_if_python_3_11_or_later, reason="Requires Python 3.10 or earlier")
 @pytest.mark.parametrize("batch_size", [None, 1, 2, 3])
 @pytest.mark.asyncio
 async def test_get_batch_details_total_timeout(batch_size):