v1.2.0

• Update libfluidsynth to 2.0.2 (using fluidsynth-emscripten v2.0.2-em-fix1)
• Add 'midiProgramSelect' API for synthesizer
• Add APIs for hooking MIDI events from player
• Add APIs for handling event data from sequencer (as 'sequencer client')
• Fix handling errors on the audio worklet