vendor: update all dependencies to latest versions

vendor/cloud.google.com/go/pubsub/fake_test.go

@@ -76,15 +76,8 @@ func (s *fakeServer) wait() {
 }
 
 func (s *fakeServer) StreamingPull(stream pb.Subscriber_StreamingPullServer) error {
-	// Receive initial request.
-	_, err := stream.Recv()
-	if err == io.EOF {
-		return nil
-	}
-	if err != nil {
-		return err
-	}
-	// Consume and ignore subsequent requests.
+	s.wg.Add(1)
+	defer s.wg.Done()
 	errc := make(chan error, 1)
 	s.wg.Add(1)
 	go func() {
@@ -124,7 +117,7 @@ func (s *fakeServer) StreamingPull(stream pb.Subscriber_StreamingPullServer) err
 			// Add a slight delay to ensure the server receives any
 			// messages en route from the client before shutting down the stream.
 			// This reduces flakiness of tests involving retry.
-			time.Sleep(100 * time.Millisecond)
+			time.Sleep(200 * time.Millisecond)
 		}
 		if pr.err == io.EOF {
 			return nil