message: feat: add isDragging method
diff: @@ -119,7 +119,25 @@ export default class Moveable<T = {}> extends React.PureComponent<MoveableProps
  public updateTarget(): void {
  this.moveable.updateTarget();
  }
  -
  + /**
  + * Check if the moveable state is being dragged.
  + * @method Moveable#isDragging
  + * @example
  + * import Moveable from "moveable";
  + *
  + * const moveable = new Moveable(document.body);
  + *
  + * // false
  + * console.log(moveable.isDragging());
  + *
  + * moveable.on("drag", () => {
  + * // true
  + * console.log(moveable.isDragging());
  + * });
  + */
  + public isDragging(): boolean {
  + return this.moveable.isDragging();
  + }
  /**
  * You can get the vertex information, position and offset size information of the target based on the container.
  * @method Moveable#getRect
  