Usage:  circleci orb diff <namespace>/<orb> --from <v1> --to <v2> [flags]

Flags:
      --from string   the first version (semver e.g. 1.0.0, or a dev label e.g. dev:my-branch)
  -h, --help          help for diff
      --to string     the second version, in the same form as --from
  