update panic recover in Twowaysql.Transaction.

[future-taga]

Improved recover and automatic rollback in the panic

go-twowaysql/twowaysql.go

Lines 77 to 95 in 7bf8f7c

	func (t *Twowaysql) Transaction(ctx context.Context, fn func(tx TwowaysqlTx) error) error {
	tx, err := t.Begin(ctx)
	if err != nil {
	return err
	}
	if err := fn(*tx); err != nil {
	if rerr := tx.Rollback(); rerr != nil {
	return fmt.Errorf("failed rollback %v: %w", rerr, err)
	}
	return err
	}
	if err := tx.Commit(); err != nil {
	return err
	}
	return nil
	}