So siehts ganz gut aus !

node_modules/es5-ext/number/is-number.js

@@ -0,0 +1,10 @@
+"use strict";
+
+var objToString = Object.prototype.toString, id = objToString.call(1);
+
+module.exports = function (value) {
+	return (
+		typeof value === "number" ||
+		(value instanceof Number || (typeof value === "object" && objToString.call(value) === id))
+	);
+};