message: feat: add clear method
diff: @@ -5,9 +5,8 @@ const ToastConstructor = Vue.extend(require('./toast.vue'));
  let instance;
  const getInstance = () => {
  - if (instance) {
  - instance.clear();
  - }
  + if (instance) instance.clear();
  +
  instance = new ToastConstructor({
  el: document.createElement('div')
  });
  @@ -70,4 +69,8 @@ Toast.fail = (options) => {
  }, options));
  };
  +Toast.clear = () => {
  + if (instance) instance.clear();
  +}
  +
  export default Toast;
  