Auto-update dependencies. (firebase#638)

Author: dpebot

fcm-notifications/public/firebase-messaging-sw.js

@@ -1,8 +1,8 @@
 // Import and configure the Firebase SDK
 // These scripts are made available when the app is served or deployed on Firebase Hosting
 // If you do not serve/host your project using Firebase Hosting see https://firebase.google.com/docs/web/setup
-importScripts('/__/firebase/3.9.0/firebase-app.js');
-importScripts('/__/firebase/3.9.0/firebase-messaging.js');
+importScripts('/__/firebase/7.5.0/firebase-app.js');
+importScripts('/__/firebase/7.5.0/firebase-messaging.js');
 importScripts('/__/firebase/init.js');
 
 firebase.messaging();