python <3.10 compat

Author: jekozyra

google/cloud/firestore_v1/async_transaction.py

@@ -24,10 +24,14 @@
     Coroutine,
     Optional,
     TypeVar,
-    ParamSpec,
     Concatenate,
 )
 
+try:
+    from typing import ParamSpec
+except ImportError:
+    from typing_extensions import ParamSpec
+
 from google.api_core import exceptions, gapic_v1
 from google.api_core import retry_async as retries