libremidi update to v5.4.3 and added virtual midi out as default

include/libremidi/backends/winuwp/midi_in.hpp

@@ -5,7 +5,7 @@
 #include <libremidi/detail/midi_in.hpp>
 #include <libremidi/detail/midi_stream_decoder.hpp>
 
-namespace libremidi
+NAMESPACE_LIBREMIDI
 {
 
 class midi_in_winuwp final
@@ -47,7 +47,8 @@ public:
     midi_start_timestamp = std::chrono::steady_clock::now();
 
     port_.MessageReceived(
-        [=](const winrt::Windows::Devices::Midi::IMidiInPort& inputPort,
+        [this](
+            const winrt::Windows::Devices::Midi::IMidiInPort&,
             const winrt::Windows::Devices::Midi::MidiMessageReceivedEventArgs& args) {
       this->process_message(args.Message());
     });