code: function postCast(value, parameterDefinition) {
  	const type = parameterDefinition.type;
  	const format = parameterDefinition.format;
  	if (type === 'string' && (format === 'date' || format === 'date-time')) {
  		return new Date(value);
  	} else {
  		return value;
  	}
  }
docs: Casts values AFTER validated to support string formats