Add DKI order type

To download Exchange rate files and fix syntax error.

Signed-off-by: Herman van Hazendonk <github.com@herrie.org>

lib/predefinedOrders/DKI.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const utils = require('../utils');
+
+module.exports = (start = null, end = null) => ({
+	version: 'h004',
+	orderDetails: {
+		OrderType: 'DKI',
+		OrderAttribute: 'DZHNN',
+		StandardOrderParams: utils.dateRange(start, end),
+	},
+	operation: 'download',
+});