更新下依赖包就好了，新版本修复了这个bug

var _loop = function _loop() {
      var options = _this.queue.shift();

      var successFn = options.successFn,
          failFn = options.failFn;

      options.success = function () {
        _this.pendingQueue = _this.pendingQueue.filter(function (item) {
          return item !== options;
        });

        _this.run();

        for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }

        successFn && successFn.apply(options, args);
      };

      options.fail = function () {
        _this.pendingQueue = _this.pendingQueue.filter(function (item) {
          return item !== options;
        });

        _this.run();

        for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
          args[_key2] = arguments[_key2];
        }

        failFn && failFn.apply(options, args);
      };

      _this.pendingQueue.push(options);

      return {
        v: wx.request(options)
      };
    };

成功回调取的是options里的successFn，不是success，很迷