v1.2.0+ 版本build后有保留字的内容不会特殊处理

[wjlotus1992]

var map = {};
if (ie < 8) {
map['for'] = 'htmlFor';
map['class'] = 'className';
}
else {
map['htmlFor'] = 'for';
map['className'] = 'class';
}
比如这段代码在1.2.2版本中会被压缩
.....a.for = "htmlFor".... 在ie8版本中报"缺少标识符"的错误
还有这种代码：
function createPromise(resolver) {
return {
'then': function (onFulfilled, onRejected) {
return then(resolver, onFulfilled, onRejected);
},

        'catch': function (onRejected) {
            return then(resolver, null, onRejected);
        }
    };
}

catch被压缩后也没有引号，同样报错，希望authors能尽快处理