Python 3.11 trial with cython 3.04

This fixes the Python 3.11 issue, it depends on a newer version of
cython, which fixes the 'C includes of "longintrepr.h"' issue

Python 3.12 is still broken, however.

Collecting pyyaml==6.0 (from -r requirements.txt (line 9))
  Downloading PyYAML-6.0.tar.gz (124 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 125.0/125.0 kB 30.0 MB/s eta 0:00:00
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'error'
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [54 lines of output]
      running egg_info
      writing lib/PyYAML.egg-info/PKG-INFO
      writing dependency_links to lib/PyYAML.egg-info/dependency_links.txt
      writing top-level names to lib/PyYAML.egg-info/top_level.txt
      Traceback (most recent call last):
        File "/opt/hostedtoolcache/Python/3.12.0/x64/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
          main()
        File "/opt/hostedtoolcache/Python/3.12.0/x64/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.github/workflows/installation-test.yml

@@ -16,9 +16,7 @@ jobs:
     strategy:
         matrix:
             os: ["ubuntu-20.04", "ubuntu-22.04"]
-            # aiohttp does not compile against 3.11
-            # https://github.com/aio-libs/aiohttp/issues/6600
-            python-ver: ["3.7", "3.8", "3.9", "3.10"]
+            python-ver: ["3.7", "3.8", "3.9", "3.10", "3.11"]
             exclude:
                 - os: ubuntu-22.04
                   python-ver: 3.6

requirements.txt

@@ -1,3 +1,4 @@
+cython==3.0.4
 pytest==7.3.1
 pytest-rerunfailures==10.2
 pytest-html==3.2.0