Let StreamSubscription.cancel return a Future.

sdk/lib/_internal/pub/pub.status

Index: sdk/lib/_internal/pub/pub.status
diff --git a/sdk/lib/_internal/pub/pub.status b/sdk/lib/_internal/pub/pub.status
index 78674090d93b15ad1e205bbec886a39cc654cbd8..9e9b671028cdd67cf00768df4f7407436baf9a19 100644
--- a/sdk/lib/_internal/pub/pub.status
+++ b/sdk/lib/_internal/pub/pub.status
@@ -4,6 +4,11 @@
 
 test/serve/missing_file_test: Pass, Fail # Issue 12570
 
+test/oauth2/with_a_malformed_credentials_authenticates_again_test: Fail # Issue 14273
+test/oauth2/with_a_server_rejected_refresh_token_authenticates_again_test: Fail # Issue 14273
+test/oauth2/with_an_expired_credentials_without_a_refresh_token_authenticates_again_test: Fail # Issue 14273
+test/oauth2/with_no_credentials_authenticates_and_saves_credentials_test: Fail # Issue 14273
+
 [ $runtime == vm && $system == windows ]
 test/serve/watch_removed_file_test: Pass, Fail # Issue 13026