Be specific about exactly which minor version of py3.6 broke things

Author: WeatherGod

src/tests/test_configobj.py

@@ -196,7 +196,7 @@ def test_nested_copy_method(self, nested_conf):
         conf_dict = nested_conf.copy()
         assert conf_dict == {'a': {'foo': 'bar', 'baz': '$foo'}}
 
-    @pytest.mark.xfail(sys.version_info >= (3, 6),
+    @pytest.mark.xfail(sys.version_info >= (3, 6, 7),
                        reason="dict() now uses self.items()"
                               " instead of dict.items()",
                        strict=True)