Workaround mocket issue with urllib3 2.0.0

See mindflayer/python-mocket#199

Author: oschwald

setup.cfg

@@ -29,6 +29,9 @@ deps =
     # explicitly require indirect dependency to fix build failure.
     # This can be removed when aiohttp 3.9 is released.
     charset-normalizer==2.1.1
+    # This is to work around https://github.com/mindflayer/python-mocket/issues/199
+    # It can be removed once that is fixed.
+    urllib3==1.26.15
 commands = pytest tests
 
 [testenv:py310-black]