code: function patchMeta(uri, data) {
    const id = replaceVersion(uri.replace('/meta', ''));
  
    return db.patchMeta(id, data)
      .then(() => getMeta(uri))
      .then(pubToBus(id));
  }
docs: Update a subset of properties on
  a metadata object
  
  @param {String} uri
  @param {Object} data
  @returns {Promise}