fix: client initialization error with bootstrapped cache (#385)

Author: ErliSoares

UnleashClient/connectors/bootstrap_connector.py

@@ -11,6 +11,7 @@ def __init__(
         engine: UnleashEngine,
         cache: BaseCache,
     ):
+        super().__init__(engine, cache)
         self.engine = engine
         self.cache = cache
         self.job = None