code: func (r *Release) Insert(tx *sql.Tx) error {
  	if !r.validBundle() {
  		return r.errInvalidBundle()
  	}
  
  	query := fmt.Sprintf("INSERT INTO %s_releases (version, released_at) VALUES (?, ?)",
  		r.table())
  	_, err := tx.Exec(query, r.Version, r.ReleasedAt)
  	return err
  }
docs: // Insert stores the Release in the database.