vuex actions传递多参数的处理方法

`https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment`

this.$store.dispatch('delTask', {task, index}); 

  delTask : function (store, {index, task}) {
   let url = 'http://zhihu.carsonlius_liu.cn/api/tasks/' + task.id;
   Http.$http.delete(url).then(function (response) {
    if (response.body.status === 'success') {
     store.commit('delSpecialTask', index);
    }
   });
  }