include node_modules so release .zip is deployable

node_modules/es5-ext/math/sign/shim.js

@@ -0,0 +1,7 @@
+"use strict";
+
+module.exports = function (value) {
+	value = Number(value);
+	if (isNaN(value) || value === 0) return value;
+	return value > 0 ? 1 : -1;
+};