pythonPackages.python-engineio: Disable tests on darwin

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

···
     pytestCheckHook
   ];
 
+  doCheck = !stdenv.isDarwin;
+
   preCheck = stdenv.lib.optionalString stdenv.isLinux ''
     echo "nameserver 127.0.0.1" > resolv.conf
     export NIX_REDIRECTS=/etc/protocols=${iana-etc}/etc/protocols:/etc/resolv.conf=$(realpath resolv.conf) \