Feature request: add support for versioned docsets

[jcyamo]

In Dash, when installing a new docset, there is an option to install the latest version or an older specific version, if available.

This would be a great addition to helm-dash which currently only allows for installing the latest version of a docset.

[areina]

Hi @jonyamo , I agree, that would be an interesting addition. Will see if we can integrate it soon. Thanks for your feedback!