Support for Helm v3

[mauriballes]

Please give us a support for Helm 3. It is a great tool. Maybe a doc in order to do a fork to implement support.

[sonicaj]

Just came across this while looking for a reliable solution to backup helm releases. It would indeed be great if we could add support for helm v3.

[sohnaeo]

I also come across this while finding backup solution, we recently upgraded to helm 3 , it would be an awsome if it supports helm v3.