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

include/libremidi/backends/alsa_raw/midi_out.hpp

@@ -8,7 +8,7 @@
 #include <atomic>
 #include <thread>
 
-namespace libremidi::alsa_raw
+NAMESPACE_LIBREMIDI::alsa_raw
 {
 class midi_out_impl final
     : public midi1::out_api
@@ -44,8 +44,7 @@ public:
     int status = snd.rawmidi.open(NULL, &midiport_, portname, mode);
     if (status < 0)
     {
-      libremidi_handle_error(
-          this->configuration, "cannot open device.");
+      libremidi_handle_error(this->configuration, "cannot open device.");
       return from_errc(status);
     }
     return stdx::error{};
@@ -87,8 +86,7 @@ public:
   {
     if (auto err = snd.rawmidi.write(midiport_, message, size); err < 0)
     {
-      libremidi_handle_error(
-          this->configuration, "cannot write message.");
+      libremidi_handle_error(this->configuration, "cannot write message.");
       return from_errc(err);
     }