Integrate dyff as alternative diff visualization

[steigr]

Hi,

this is a feature request. The tool https://github.com/homeport/dyff seems like a very handy addition the helm-diff's functionality to check for changes done by helm on upgrade (install).

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.