A very helpful addition. I agree 
Sadly TsDoc does not support it:
And i assume the doc compilation will fail because of an unknown tag.
I guess this can be overridden, but - babylon versioning (and the version we call “stable” is not the same as many other projects. We technically only have two versions - current and preview, and the fact that we guaranty backwards compatibility can help very much with easily upgrading your current version. Having said that, the new documentation page will also have a “Since” tag in the doc pages (optional tag for doc writers).
This is just to start a conversion about it! I will actually be happy to have it added, if we can get tsdoc and our doc parser to play nicely with it.