通过提交的msg自动关闭issues

比如有人提交了个issues:

https://github.com/AlloyTeam/AlloyTouch/issues/6

然后去主干上改代码,改完之后提交填msg的时候,填入:

fix https://github.com/AlloyTeam/AlloyTouch/issues/6

这个issues会自动被关闭。

当然不仅仅是fix这个关键字。下面这些关键字也可以:

```sh close

closes

closed

fixes

fixed

resolve

resolves

resolved ````