code: function get(key) {
    return redis.get(key)
      .then(data => {
        if (isUri(key)) return data;
        return JSON.parse(data); // Parse non-uri data to match Postgres
      })
      .catch(() => postgres.get(key));
  }
docs: Return a value from the db or cache. Must
  return a Object, not stringified JSON
  
  @param  {String} key
  @return {Promise}