Support to set helm options (e.g. --insecure)

Is it possible to add a generic way to pass options to the CLI call of helm?

I currently need a way to bypass certificate verification to access a project's chart repository. This can be done with one of the "--insecure" options, depending on what really needs to be done.

So adding just the handling of insecure would be fine, but adding a general way to just pass options is probably even more useful in the long run.