make FirebaseApp tests work again

Author: Feiyang1

packages/app-types/index.d.ts

@@ -1,3 +1,5 @@
+import { Provider } from "@firebase/component";
+
 /**
  * @license
  * Copyright 2017 Google Inc.
@@ -100,4 +102,4 @@ export interface FirebaseNamespace {
 
   // The current SDK version.
   SDK_VERSION: string;
-}
+}

packages/app/index.ts

@@ -44,7 +44,7 @@ const initializeApp = firebaseNamespace.initializeApp;
 // TODO: This disable can be removed and the 'ignoreRestArgs' option added to
 // the no-explicit-any rule when ESlint releases it.
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
-firebaseNamespace.initializeApp = function(...args: any) {
+firebaseNamespace.initializeApp = function (...args: any) {
   // Environment check before initializing app
   // Do the check in initializeApp, so people have a chance to disable it by setting logLevel
   // in @firebase/logger

packages/app/test/firebaseApp.test.ts

@@ -315,7 +315,7 @@ function firebaseAppTests(
 }
 
 class TestService implements FirebaseService {
-  constructor(private app_: FirebaseApp, public instanceIdentifier?: string) {}
+  constructor(private app_: FirebaseApp, public instanceIdentifier?: string) { }
 
   // TODO(koss): Shouldn't this just be an added method on
   // the service instance?