Fixed #1 - Fixed the whatsnew-** script for loading release notes into builds

Added test to ensure that release notes are parsed properly
Updated to latest dependencies to fix security vulnerability
Updated GH Actions Workflow to run test before updating tag
Updated README.md to reflect proper whatsnew documentation.

node_modules/es-abstract/2018/DateString.js

@@ -0,0 +1,30 @@
+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+
+var weekdays = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
+var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
+
+var $isNaN = require('../helpers/isNaN');
+var padTimeComponent = require('../helpers/padTimeComponent');
+
+var Type = require('./Type');
+var WeekDay = require('./WeekDay');
+var MonthFromTime = require('./MonthFromTime');
+var YearFromTime = require('./YearFromTime');
+var DateFromTime = require('./DateFromTime');
+
+// https://www.ecma-international.org/ecma-262/9.0/#sec-datestring
+
+module.exports = function DateString(tv) {
+	if (Type(tv) !== 'Number' || $isNaN(tv)) {
+		throw new $TypeError('Assertion failed: `tv` must be a non-NaN Number');
+	}
+	var weekday = weekdays[WeekDay(tv)];
+	var month = months[MonthFromTime(tv)];
+	var day = padTimeComponent(DateFromTime(tv));
+	var year = padTimeComponent(YearFromTime(tv), 4);
+	return weekday + '\x20' + month + '\x20' + day + '\x20' + year;
+};