test(io): use configuration_values instead of deprecated current_state

Signed-off-by: Fernando Macedo <fgmacedo@gmail.com>

Author: fgmacedo

tests/test_io.py

@@ -75,4 +75,4 @@ def reject(*args, **kwargs):
         # the machine would land in s2. With it, the validator aborts.
         with pytest.raises(Rejected):
             sm.send("go")
-        assert sm.current_state.id == "s1"
+        assert "s1" in sm.configuration_values