Method onWSDisconnected

tests/test_wss.cpp:89–89

protected:
    void onWSConnected(const CppServer::HTTP::HTTPRequest& request) override { connected = true; }
    void onWSDisconnected() override { disconnected = true; }
    void onWSReceived(const void* buffer, size_t size) override { SendBinaryAsync(buffer, size); }
    void onError(int error, const std::string& category, const std::string& message) override { errors = true; }