Documentation should allow me to see old API documentation too

[mohammedzamakhan]

Currently I can see the latest API documentation, and there is no way for me to see older version API documentation.

[akhlesh]

Is there any ETA for this? I am working on 2.1.0 with upgrade adapter and after 2.2.0, upgrade documentation got changed completely.

[abierbaum]

This seems like a key requirement given how quickly the angular versions are going to be moving. Some of us can't update with ever angular release and need a way to be sure we are seeing the docs and API for the version we have. I would be fine if only the API section allowed viewing older versions.