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/2016/InLeapYear.js

@@ -0,0 +1,21 @@
+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $EvalError = GetIntrinsic('%EvalError%');
+
+var DaysInYear = require('./DaysInYear');
+var YearFromTime = require('./YearFromTime');
+
+// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.3
+
+module.exports = function InLeapYear(t) {
+	var days = DaysInYear(YearFromTime(t));
+	if (days === 365) {
+		return 0;
+	}
+	if (days === 366) {
+		return 1;
+	}
+	throw new $EvalError('Assertion failed: there are not 365 or 366 days in a year, got: ' + days);
+};