ts fix for TweenManager

Author: jcyuan

src/tweens/TweenManager.js

@@ -155,7 +155,7 @@ var TweenManager = new Class({
      * @method Phaser.Tweens.TweenManager#createTimeline
      * @since 3.0.0
      *
-     * @param {Phaser.Types.Tweens.TimelineBuilderConfig} config - The configuration object for the Timeline and its Tweens.
+     * @param {Phaser.Types.Tweens.TimelineBuilderConfig} [config] - The configuration object for the Timeline and its Tweens.
      *
      * @return {Phaser.Tweens.Timeline} The created Timeline object.
      */
@@ -170,7 +170,7 @@ var TweenManager = new Class({
      * @method Phaser.Tweens.TweenManager#timeline
      * @since 3.0.0
      *
-     * @param {Phaser.Types.Tweens.TimelineBuilderConfig} config - The configuration object for the Timeline and its Tweens.
+     * @param {Phaser.Types.Tweens.TimelineBuilderConfig} [config] - The configuration object for the Timeline and its Tweens.
      *
      * @return {Phaser.Tweens.Timeline} The created Timeline object.
      */

types/phaser.d.ts

@@ -84340,13 +84340,13 @@ declare namespace Phaser {
              * Create a Tween Timeline and return it, but do NOT add it to the active or pending Tween lists.
              * @param config The configuration object for the Timeline and its Tweens.
              */
-            createTimeline(config: Phaser.Types.Tweens.TimelineBuilderConfig): Phaser.Tweens.Timeline;
+            createTimeline(config?: Phaser.Types.Tweens.TimelineBuilderConfig): Phaser.Tweens.Timeline;
 
             /**
              * Create a Tween Timeline and add it to the active Tween list/
              * @param config The configuration object for the Timeline and its Tweens.
              */
-            timeline(config: Phaser.Types.Tweens.TimelineBuilderConfig): Phaser.Tweens.Timeline;
+            timeline(config?: Phaser.Types.Tweens.TimelineBuilderConfig): Phaser.Tweens.Timeline;
 
             /**
              * Create a Tween and return it, but do NOT add it to the active or pending Tween lists.