add stats.js on wavesurfer

[jomin398]

I came across this while coding.
If I do this, I can see a graph like fps
I wanted someone to make this to plugin.

import Stats from "stats.js"; // from mrdoob's stats.js

const stats = new Stats();
stats.showPanel( 0 ); // 0: fps, 1: ms, 2: mb, 3+: custom
document.body.appendChild( stats.dom );

//In addition to adding stats by Override the render function of Wavesurfer
WaveSurfer.prototype.initTimerEvents = function() {
  // The timer fires every 16ms for a smooth progress animation
  this.subscriptions.push(this.timer.on('tick', () => {
    stats.begin();
    const currentTime = this.getCurrentTime();
    this.renderer.renderProgress(currentTime / this.getDuration(), true);
    this.emit('timeupdate', currentTime);
    this.emit('audioprocess', currentTime);
    stats.end();
  }));
}