fix: return the value instead of fetching it

Author: itkovian

lib/vsc/utils/cache.py

@@ -88,7 +88,7 @@ def update(self, key, data, threshold=None):
 
         if not old_data or now - old_timestamp > threshold:
             self.set(key=key, value=(now, data), expire=threshold)
-            return self[key]
+            return (now, data)
         else:
             return (old_timestamp, old_data)