message: fix the wrong variable name 'event' in Emitter.ts
diff: @@ -69,11 +69,11 @@ export class Emitter<EventType extends string = string> extends Tone {
  if (isUndef(this._events)) {
  this._events = {};
  }
  - if (this._events.hasOwnProperty(event)) {
  + if (this._events.hasOwnProperty(eventName)) {
  if (isUndef(callback)) {
  - this._events[event] = [];
  + this._events[eventName] = [];
  } else {
  - const eventList = this._events[event];
  + const eventList = this._events[eventName];
  for (let i = eventList.length - 1; i >= 0; i--) {
  if (eventList[i] === callback) {
  eventList.splice(i, 1);
  