feat(connector.py): add Connector.running attribute

src/judas_client/connector.py

@@ -54,6 +54,8 @@ class Connector:
         self.inbound_buffer: bytes = b""
         self.outbound_buffer: bytes = b""
 
+        self.running: bool = True
+
         self.on_message: Callable[[Message], None] = on_message
 
     def _send_outbound(self) -> None:
@@ -141,7 +143,7 @@ class Connector:
         """Run the main event loop."""
         self.connect()
         try:
-            while True:
+            while self.running:
                 events = self.selector.select(timeout=1)
                 for key, mask in events:
                     if mask & selectors.EVENT_READ: