新增于: v15.3.0, v14.17.0
取消此解析器进行的所有未完成的域名系统查询。
相应的 promise 将使用错误码 ECANCELLED 拒绝。
Added in: v15.3.0, v14.17.0
Cancel all outstanding DNS queries made by this resolver. The corresponding
promises will be rejected with an error with the code ECANCELLED.