Update which python versions are supported

[ways]

What maintenance does this project need?

• Setup.py says 3.9-3.14
• Some github actions build for 3.9-3.12 and some up to 3.13
• Tox tests with these versions: py38, py37, py36, py35, pypy3

Tested tox for python 3.8:

> uv python install 3.8
> uv tool run --python 3.8 tox -e py38
...
py38: commands[0]> pytest -v --flakes --cache-clear --basetemp=/home/larsfp/src/eccodes-python/.tox/py38/tmp
/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pep8.py:110: FutureWarning: Possible nested set at position 1
 EXTRANEOUS_WHITESPACE_REGEX = re.compile(r'[[({] | []}),;:]')
Traceback (most recent call last):
 File "/home/larsfp/src/eccodes-python/.tox/py38/bin/pytest", line 8, in <module>
 sys.exit(main())
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 60, in main
 config = _prepareconfig(args, plugins)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 194, in _prepareconfig
 return pluginmanager.hook.pytest_cmdline_parse(
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/hooks.py", line 289, in __call__
 return self._hookexec(self, self.get_hookimpls(), kwargs)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 68, in _hookexec
 return self._inner_hookexec(hook, methods, kwargs)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 59, in <lambda>
 self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 203, in _multicall
 gen.send(outcome)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/helpconfig.py", line 93, in pytest_cmdline_parse
 config = outcome.get_result()
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 80, in get_result
 raise ex[1].with_traceback(ex[2])
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 187, in _multicall
 res = hook_impl.function(*args)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 654, in pytest_cmdline_parse
 self.parse(args)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 871, in parse
 self._preparse(args, addopts=addopts)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 816, in _preparse
 self.pluginmanager.load_setuptools_entrypoints("pytest11")
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 282, in load_setuptools_entrypoints
 self.register(plugin, name=ep.name)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/__init__.py", line 310, in register
 ret = super(PytestPluginManager, self).register(plugin, name)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 102, in register
 hook._maybe_apply_history(hookimpl)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/hooks.py", line 336, in _maybe_apply_history
 res = self._hookexec(self, [method], kwargs)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 68, in _hookexec
 return self._inner_hookexec(hook, methods, kwargs)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/manager.py", line 59, in <lambda>
 self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 208, in _multicall
 return outcome.get_result()
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 80, in get_result
 raise ex[1].with_traceback(ex[2])
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/pluggy/callers.py", line 187, in _multicall
 res = hook_impl.function(*args)
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/setuptools/_vendor/typeguard/_pytest_plugin.py", line 53, in pytest_addoption
 add_ini_option("string")
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/setuptools/_vendor/typeguard/_pytest_plugin.py", line 22, in add_ini_option
 parser.addini(
 File "/home/larsfp/src/eccodes-python/.tox/py38/lib/python3.8/site-packages/_pytest/config/argparsing.py", line 130, in addini
 assert type in (None, "pathlist", "args", "linelist", "bool")
AssertionError
py38: exit 1 (0.21 seconds) /home/larsfp/src/eccodes-python> pytest -v --flakes --cache-clear --basetemp=/home/larsfp/src/eccodes-python/.tox/py38/tmp pid=2286013
 py38: FAIL code 1 (1.83=setup[1.62]+cmd[0.21] seconds)
 evaluation failed :( (1.88 seconds)

So which versions are actually supposed to be supported, and why are all the tox tests for very old pythons?

Organisation

No response