daemon+tests: avoid deprecated ndn-cxx functions

Change-Id: Idfa341629919d63fac140eda0b465f8f8abd38e6
diff --git a/tests/daemon/face/websocket-channel-fixture.hpp b/tests/daemon/face/websocket-channel-fixture.hpp
index e6e1e9f..3072992 100644
--- a/tests/daemon/face/websocket-channel-fixture.hpp
+++ b/tests/daemon/face/websocket-channel-fixture.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2021,  Regents of the University of California,
+ * Copyright (c) 2014-2022,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -93,7 +93,7 @@
   clientSendInterest(const Interest& interest)
   {
     const Block& payload = interest.wireEncode();
-    client.send(clientHandle, payload.wire(), payload.size(), websocketpp::frame::opcode::binary);
+    client.send(clientHandle, payload.data(), payload.size(), websocketpp::frame::opcode::binary);
   }
 
 private: