chore(deps): bump jwks-rsa to 4.0.1 (#3125)

* bump jwks-rsa to 4.0.1

* drop Node 18 from test matrix for testing

Author: yvonnep165

package-lock.json

@@ -221,7 +221,7 @@
     "fast-deep-equal": "^3.1.1",
     "google-auth-library": "^10.6.2",
     "jsonwebtoken": "^9.0.0",
-    "jwks-rsa": "^3.1.0"
+    "jwks-rsa": "^4.0.1"
   },
   "optionalDependencies": {
     "@google-cloud/firestore": "^8.6.0",