Detect chart dependency updates

[MrKrabat]

Is your feature request related to a problem? Please describe.
I want to know if helm chart dependencies have updates.

As an example, the helm chart bitnami/keycloak also deploys bitnami/postgresql as a dependency. The version tag version: 10.x.x allows postgresql to get updates.
https://github.com/bitnami/charts/blob/master/bitnami/keycloak/Chart.yaml

Describe the solution you'd like
A new output column that indicates whether dependency updates are available.

Describe alternatives you've considered
Maybe list the dependencies as a separate row.

[sudermanjr]

@MrKrabat That's an interesting idea, thanks for sharing! This seems like it might be possible, so I have marked it as an enhancement.

[dhduvall]

I'd really love to see this, too. I have some private charts that are simply wrappers around public ones, and while I don't really need to be told about updates to the private ones, I do need to know when their public dependencies are out of date.

[dhduvall]

I can see that this would be a substantial change, though, since nova outputs Releases, and helm doesn't treat dependencies as Releases.

[sudermanjr]

Sounds like a valid use-case to me, I like it! Would happily support a community contribution on this too!

[26tanishabanik]

@sudermanjr , I would like to contribute to this issue, seems like a very interesting use-case.
It would be great, if you can point me in the right direction in the repo, thanks.