fix: trigger timeupdate during seek (#4754)

If the player is paused, when we seek, the time displays don't update. So, we trigger a timeupdate manually to let components know that the time has updated.

Author: shahlabs

package-lock.json

@@ -244,6 +244,15 @@ class SeekBar extends Slider {
     super.handleMouseUp(event);
 
     this.player_.scrubbing(false);
+
+    /**
+     * Trigger timeupdate because we're done seeking and the time has changed.
+     * This is particularly useful for if the player is paused to time the time displays.
+     *
+     * @event Tech#timeupdate
+     * @type {EventTarget~Event}
+     */
+    this.player_.trigger({ type: 'timeupdate', target: this, manuallyTriggered: true });
     if (this.videoWasPlaying) {
       this.player_.play();
     }