Add the animation reverser to the animation sequencer

[the-simian]

  reverseCurrent() {
    return new Promise((resolve, reject) => {
      this.entity.anims.reverse();

      this.entity.once(
        'animationcomplete',
        (animation, frame) => {
          resolve(name);
        },
        this.entity
      );
    });
  }

drop this method in on the next update, it is easy-mode for reversing the animation where it currently is.

[the-simian]

also

  reverseSequence(name) {
    return new Promise((resolve, reject) => {
      this.entity.anims.playReverse(name, true);
      this.entity.once(
        'animationcomplete',
        (animation, frame) => {
          resolve(name);
        },
        this.entity
      );
    });
  }

this is also chainable now