material-framework/lib/database/migrations/0.1-migration.js

module.exports = {
  version: 0.1,
  name: 'Migration',
  description: 'Sets up the hidden `_version` table to track database schema version.',
  up: async (queryInterface, Sequelize) => {
    await queryInterface.createTable('_version', {
      key: {
        type: Sequelize.STRING,
        primaryKey: true
      },
      value: Sequelize.DOUBLE
    })
    await queryInterface.insert(null, '_version', { key: 'material-framework', value: 0.1 }, {})
    return 0.1
  }
}