When.js 3.3.0 发布了，该版本改进包括：
Promote when.race to public API. when.any and when.some now reject with a RangeError if the race is obviously unwinnable, for example: when.some([1,2,3], 4). See the when.any and when.some docs for more info.
下载地址：https://github.com/cujojs/when/archive/3.3.0.zip | 
