Add git tags

Hi, I'm from [cdnjs](https://github.com/cdnjs/cdnjs), we have hosted your lib on our [CDN service site](https://cdnjs.com). Recently, we want to add auto-update config for your lib, our auto-update mechanism depend on git tags, so could you please add git tags for this lib? 
Thank you!

https://github.com/cdnjs/cdnjs/issues/5771