runMigrations function
Runs the Angel Migration CLI.
Implementation
Future runMigrations(MigrationRunner migrationRunner, List<String> args) {
var cmd = CommandRunner('migration_runner', 'Executes Angel3 migrations.')
..addCommand(_UpCommand(migrationRunner))
..addCommand(_RefreshCommand(migrationRunner))
..addCommand(_ResetCommand(migrationRunner))
..addCommand(_RollbackCommand(migrationRunner));
return cmd.run(args).then((_) => migrationRunner.close());
}