PR 9426 in helm will allow setting the value for the --dry-run flag to enable the execution of lookups towards the cluster.
I would like to submit a PR that will use this new option in order to solve #263

I am hopeful the PR in helm will be merged soon and would like to start working on the implementation in helm-diff and would appreciate any thoughts. In particular, is it ok to change the implementation to always use "--dry-run=server" (i.e. execute lookups) or do we need the existing behaviour by default and a new flag in helm-diff to enable using the new helm flag?