Added the node modules.

node_modules/universal-user-agent/dist-src/index.js

@@ -0,0 +1,9 @@
+export function getUserAgent() {
+    if (typeof navigator === "object" && "userAgent" in navigator) {
+        return navigator.userAgent;
+    }
+    if (typeof process === "object" && process.version !== undefined) {
+        return `Node.js/${process.version.substr(1)} (${process.platform}; ${process.arch})`;
+    }
+    return "<environment undetectable>";
+}