Fix circular import

Author: Viicos

auth0/rest.py

@@ -6,14 +6,16 @@
 import sys
 from random import randint
 from time import sleep
-from typing import Any, Mapping
+from typing import TYPE_CHECKING, Any, Mapping
 
 import requests
 
 from auth0.exceptions import Auth0Error, RateLimitError
-from auth0.rest_async import RequestsResponse
 from auth0.types import RequestData, TimeoutType
 
+if TYPE_CHECKING:
+    from auth0.rest_async import RequestsResponse
+
 UNKNOWN_ERROR = "a0.sdk.internal.unknown"