Enable closing MidiSequencer on environment disposal

modules/midi/src/main/kotlin/io/smnp/ext/MidiModule.kt

@@ -12,4 +12,8 @@ class MidiModule : NativeModuleProvider("smnp.audio.midi") {
    override fun onModuleLoad(environment: Environment) {
       MidiSequencer.init()
    }
+
+   override fun beforeModuleDisposal(environment: Environment) {
+      MidiSequencer.dispose()
+   }
 }

modules/midi/src/main/kotlin/io/smnp/ext/midi/MidiSequencer.kt

@@ -98,4 +98,8 @@ object MidiSequencer {
    fun init() {
       sequencer.open()
    }
+
+   fun dispose() {
+      sequencer.close()
+   }
 }