build: TypeScript 3.5 upgrade (#31615)

https://github.com/Microsoft/TypeScript/wiki/Breaking-Changes#typescript-35

PR Close #31615

packages/service-worker/config/src/generator.ts

@@ -151,7 +151,7 @@ function joinUrls(a: string, b: string): string {
 }
 
 function withOrderedKeys<T extends{[key: string]: any}>(unorderedObj: T): T {
-  const orderedObj = {} as T;
+  const orderedObj = {} as{[key: string]: any};
   Object.keys(unorderedObj).sort().forEach(key => orderedObj[key] = unorderedObj[key]);
-  return orderedObj;
+  return orderedObj as T;
 }

packages/service-worker/test/integration_spec.ts

@@ -89,7 +89,7 @@ import {take} from 'rxjs/operators';
       scope.clients.getMock('default') !.queue.subscribe(msg => { mock.sendMessage(msg); });
 
       mock.messages.subscribe(msg => { scope.handleMessage(msg, 'default'); });
-      mock.notificationClicks.subscribe(msg => { scope.handleMessage(msg, 'default'); });
+      mock.notificationClicks.subscribe((msg: Object) => { scope.handleMessage(msg, 'default'); });
 
       mock.setupSw();
       reg = mock.mockRegistration !;

packages/service-worker/testing/mock.ts

@@ -28,7 +28,7 @@ export class MockServiceWorkerContainer {
   mockRegistration: MockServiceWorkerRegistration|null = null;
   controller: MockServiceWorker|null = null;
   messages = new Subject<any>();
-  notificationClicks = new Subject();
+  notificationClicks = new Subject<{}>();
 
   addEventListener(event: 'controllerchange'|'message', handler: Function) {
     if (event === 'controllerchange') {