usage: tautline publish-release-update [-h] [--version VERSION] [--last LAST]
                                       [--webhook-env WEBHOOK_ENV]
                                       [--webhook-url WEBHOOK_URL] [--dry-run]

options:
  -h, --help            show this help message and exit
  --version VERSION     Release version to summarize; defaults to current
                        VERSION
  --last LAST           Publish the last N release summaries in chronological
                        order
  --webhook-env WEBHOOK_ENV
  --webhook-url WEBHOOK_URL
                        One-off Google Chat webhook URL; do not commit this
  --dry-run
