"IS_DATE_IN_THE_FUTURE" should also accept boolean values

[syldb]

The date validation "IS_DATE_IN_THE_FUTURE" only accepts strings values.

        {
            'field_id': self.text_field.id,
            'type': 'IS_DATE_IN_THE_FUTURE',
            'value': True,
        }

The following payload would trigger a 422 error because we expect a string value. We want to accept booleans and convert it to string.