Checklist for publishing

1. Update CHANGELOG.md with changes per Keep a Changelog format.
2. Update documentation in website/docs (and the latest version in website/versioned_docs if not releasing a new major version).
3. Run npx lerna version [major|minor|patch|prerelease] (this automatically runs the version script in ./package.json before committing and tagging).
4. Run npx lerna publish from-git (add --dist-tag next if version was prerelease in previous step).