chg: use future annotations workaround on python 3.8

* the above import trick is correct for ``get_state_str()`` signature

Signed-off-by: Stephen Arnold <[email protected]>

src/timew_status/utils.py

@@ -2,6 +2,8 @@
 Base configuration and app helper functions.
 """
 
+from __future__ import annotations
+
 import datetime
 import os
 import subprocess