Update to NPM version

ProjectSourceCode/node_modules/es-abstract/2020/IsPropertyKey.js

@@ -0,0 +1,7 @@
+'use strict';
+
+// https://262.ecma-international.org/6.0/#sec-ispropertykey
+
+module.exports = function IsPropertyKey(argument) {
+	return typeof argument === 'string' || typeof argument === 'symbol';
+};