Pull a buildpack from a registry and store it locally
pack buildpack pull <uri> [flags]
pack buildpack pull example/my-buildpack@1.0.0
  -r, --buildpack-registry string   Buildpack Registry name
  -h, --help                        Help for 'pull'
      --force-color   Force color output
      --no-color      Disable color output
  -q, --quiet         Show less output
      --timestamps    Enable timestamps in output
  -v, --verbose       Show more output