fix vault work memory leak

gestalt/vault.py

@@ -31,6 +31,7 @@ def __init__(self,
                 with role and jwt string from kubernetes
         """
         self._scheme: str = scheme
+        self._run_worker = True
         self.dynamic_token_queue: Queue[Tuple[str, str, str]] = Queue()
         self.kubes_token_queue: Queue[Tuple[str, str, str]] = Queue()
 
@@ -77,6 +78,9 @@ def __init__(self,
                                           args=(self.kubes_token_queue, ))
             kubernetes_ttl_renew.start()
 
+    def __del__(self) -> None:
+        self._run_worker = False
+
     @retry(RuntimeError, delay=3, tries=3)  # type: ignore
     def get(
         self,
@@ -159,7 +163,7 @@ def worker(self, token_queue: Queue) -> None:  # type: ignore
         """
 
         try:
-            while True:
+            while self._run_worker:
                 if not token_queue.empty():
                     token_type, token_id, token_duration = token = token_queue.get(
                     )

setup.py

@@ -11,7 +11,7 @@ def readme():
     reqs_list = list(map(lambda x: x.rstrip(), reqs))
 
 setup(name='gestalt-cfg',
-      version='3.3.2',
+      version='3.3.3',
       description='A sensible configuration library for Python',
       long_description=readme(),
       long_description_content_type="text/markdown",