refactor: Bump firebase-admin from 13.5.0 to 13.6.0 (#467)

Author: dependabot[bot]

package-lock.json

@@ -26,7 +26,7 @@
   "dependencies": {
     "@parse/node-apn": "6.5.0",
     "expo-server-sdk": "3.15.0",
-    "firebase-admin": "13.5.0",
+    "firebase-admin": "13.6.0",
     "npmlog": "7.0.1",
     "parse": "7.0.2",
     "web-push": "3.6.7"