add setDefaultAudioOutput to source

#767 only contains changes to the compiled artifact and not the source - this is to add the same code so that `npm run build` won't lose the change.

js/iosrtc.js

@@ -51,10 +51,13 @@ module.exports = {
 	// Select audio output (earpiece or speaker).
 	selectAudioOutput: selectAudioOutput,
 
+	// Set default audio output (earpiece or speaker).
+	setDefaultAudioOutput: setDefaultAudioOutput,
+
 	// turnOnSpeaker with options
 	turnOnSpeaker: turnOnSpeaker,
 
-	// Checking permision (audio and camera)
+	// Checking permission (audio and camera)
 	requestPermission: requestPermission,
 
 	// Expose a function to initAudioDevices if needed, sets the audio session active
@@ -101,6 +104,14 @@ function selectAudioOutput(output) {
 	}
 }
 
+function setDefaultAudioOutput(output) {
+	debug('setDefaultAudioOutput() | [output:"%s"]', output);
+	if (!['earpiece', 'speaker'].includes(output)) {
+		throw new Error('output must be "earpiece" or "speaker"');
+	}
+	exec(null, null, 'iosrtcPlugin', 'setDefaultAudioOutput', [output === 'speaker']);
+}
+
 function turnOnSpeaker(isTurnOn) {
 	debug('turnOnSpeaker() | [isTurnOn:"%s"]', isTurnOn);