text: exports.up = function (db) {
    return Promise.resolve()
      .then(() => {
        return db.addColumn('version', 'application_name', {
          type: 'string',
          defaultValue: 'Unknown application',
          primaryKey: true
        })
      })
  }
  
  exports.down = function (db) {
    return Promise.resolve()
      .then(() => db.dropTable('version'))
  }
  