python311.pkgs.mox3: disable

Uses APIs removed in Python 3.11, for example this exception in
aprslib's tests:

E AttributeError: module 'inspect' has no attribute 'getargspec'

/nix/store/x6ps6s9k2i1dcnb9jf1kbfgghgf6k53f-python3.11-mox3-1.1.0/lib/python3.11/site-packages/mox3/mox.py:909: AttributeError

Unmaintained upstream.

pkgs/development/python-modules/mox3/default.nix

···
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
+, pythonAtLeast
 , subunit
 , testrepository
 , testtools
···
 buildPythonPackage rec {
   pname = "mox3";
   version = "1.1.0";
-  disabled = pythonOlder "3.6";
+  disabled = pythonOlder "3.6" || pythonAtLeast "3.11";
 
   src = fetchPypi {
     inherit pname version;