fix: get rid of math.random in utils.generateUUID

src/utils.js

@@ -1,5 +1,7 @@
 'use strict';
 
+const crypto = require('crypto');
+
 process.profile = function (operation, start) {
 	console.log('%s took %d milliseconds', operation, process.elapsedTimeSince(start));
 };
@@ -14,4 +16,17 @@ utils.getLanguage = function () {
 	const meta = require('./meta');
 	return meta.config && meta.config.defaultLang ? meta.config.defaultLang : 'en-GB';
 };
+
+utils.generateUUID = function () {
+	// from https://github.com/tracker1/node-uuid4/blob/master/index.js
+	let rnd = crypto.randomBytes(16);
+	/* eslint-disable no-bitwise */
+	rnd[6] = (rnd[6] & 0x0f) | 0x40;
+	rnd[8] = (rnd[8] & 0x3f) | 0x80;
+	/* eslint-enable no-bitwise */
+	rnd = rnd.toString('hex').match(/(.{8})(.{4})(.{4})(.{4})(.{12})/);
+	rnd.shift();
+	return rnd.join('-');
+};
+
 module.exports = utils;