Timeline playback settings

Specify the timings and behaviours of a timeline.
Timeline playback settings are defined directly in the createTimeline() parameters Object.

createTimeline({
┌───────────────────┐
│ defaults: {       │
│   ease: 'out(3)', │
│   duration: 500,  │
│ },                ├─ Playback Settings
│ loop: 3,          │
│ alternate: true,  │
│ autoplay: false,  │
└───────────────────┘
  onBegin: () => {},
  onLoop: () => {},
  onUpdate: () => {},
});