Log Message:
audio/fluidsynth: Update to 2.4.2

Changelog:
2.4.2:
    Fix audible clicks when turning off voices while using a high filter \ 
resonance (#1427)
    Fix a build failure with MSYS2 and MinGW when processing VersionResource.rc \ 
(#1448, thanks to @pedrolcl)
    Fix a crash on startup when there are no MIDI devices available on Windows \ 
(#1446, thanks to @pedrolcl)
    Restore discovery of libsndfile (#1445)
    Fix a race condition when loading SF3 files containing multiple uncompressed \ 
samples (#1457)