Fixed another rare migration bug from Alta's end.

After ~50 days consecutively of running a bot with py-tale, it crashed with this error:

`{'id': 26, 'event': 'response', 'key': 'GET /ws/migrate', 'content': '{"message":"IDX20803: Unable to obtain configuration from: \'System.String\'.","error_code":"None"}', 'responseCode': 403}`

I believe this is either due to a bug or crash on Alta's end. In this new version of py-tale I've created a generic check to ensure the response code is `200` and if not, perform a manual migration just like it would if the response took too long from the last update of py-tale.

py_tale.py

@@ -484,7 +484,14 @@ async def run_ws(self):
                         var = json.loads(var)                               #Implement unsubscribing on old websocket? Maybe next verison, I don't think it's an issue.
                         if "key" in var:
                             if var["key"] == "GET /ws/migrate":
-                                self.migrate_token = var["content"]
+                                try:
+                                    if int(var["responseCode"]) == 200:
+                                        self.migrate_token = var["content"]
+                                    else:
+                                        print(Fore.RED + "Error in migrate response: Ignoring new key. I will perform a manual migrate instead. (non-200 response code)", end=Style.RESET_ALL + "\n")
+                                except Exception as e:
+                                    if self.debug:
+                                        print(Fore.RED + f"Error in migrate response: Ignoring new key. I will perform a manual migrate instead. ({e})", end=Style.RESET_ALL + "\n")
                         if self.ws is websocket:                    #Only listen to subscriptions if the websocket is the latest websocket. Safety check for preventing double subscriptions if migrate fails while two websockets are open.
                             if "id" in var and "event" in var:
                                 if var["event"] == "response" and int(var["id"]) in self.websocket_responses: