message: skip sqllite
diff: * @param {import('knex').Knex} knex
  */
  exports.up = async function up(knex) {
  - return knex.schema.alterTable('signing_keys', function (t) {
  - t.timestamp('created_at', { useTz: true, precision: 0 })
  + // Sqlite does not support alter column.
  + if (knex.client.config.client !== 'sqlite3') {
  + await knex.schema.alterTable('signing_keys', table => {
  + table
  + .timestamp('created_at', { useTz: true, precision: 0 })
  .notNullable()
  .defaultTo(knex.fn.now())
  .comment('The creation time of the key')
  .alter();
  });
  + }
  };
  /**
  * @param {import('knex').Knex} knex
  */
  exports.down = async function down(knex) {
  - return knex.schema.alterTable('signing_keys', function (t) {
  - t.timestamp('created_at', { useTz: false, precision: 0 })
  + // Sqlite does not support alter column.
  + if (knex.client.config.client !== 'sqlite3') {
  + await knex.schema.alterTable('signing_keys', table => {
  + table
  + .timestamp('created_at', { useTz: false, precision: 0 })
  .notNullable()
  .defaultTo(knex.fn.now())
  .comment('The creation time of the key')
  .alter();
  });
  + }
  };
  