chore: update defu to 6.1.6

Author: pi0

package.json

@@ -34,7 +34,7 @@
   "dependencies": {
     "cookie-es": "^1.2.2",
     "crossws": "^0.3.5",
-    "defu": "^6.1.4",
+    "defu": "^6.1.6",
     "destr": "^2.0.5",
     "iron-webcrypto": "^1.2.1",
     "node-mock-http": "^1.0.4",