Change repository visibility?

[john-b-yang]

Hello, I could not determine if there is a way to toggle the visibility of a repository?

My specific request is that I have a lot of private repositories in an organization, and I'm interested in making all of them public.

$ ./hub-tool/hub-tool repo -h
Manage repositories

Usage:
  ./hub-tool/hub-tool repo
  ./hub-tool/hub-tool repo [command]

Available Commands:
  ls          List all the repositories from your account or an organization
  rm          Delete a repository

Flags:
  -h, --help   help for repo

Global Flags:
      --verbose   Print logs

Use "./hub-tool/hub-tool repo [command] --help" for more information about a command.

I see that ls and rm are options, are there more that are not shown?

If it's not available, I'd really appreciate this feature (hopefully it's not too hard to implement?)