fix(auth): removed the shareReplay from auth and addressed Zone.js issues (#2682)

* Only `keepUnstableUntilFirst` on `redirectResult`, `shareReplay` it
* Remove shareReplay which causes issues when loading/checking auth lazily
* Move guards over to `.user` so token changes will be evaluated
* Upgrade the node modules in sample

Closes #2681

Author: jamesdaniels

sample/src/app/auth/auth.component.ts

@@ -29,6 +29,7 @@ export class AuthComponent implements OnInit, OnDestroy {
   showLogoutButton = false;
 
   constructor(public readonly auth: AngularFireAuth, @Inject(PLATFORM_ID) platformId: object) {
+
     if (!isPlatformServer(platformId)) {
       this.userDisposable = this.auth.authState.pipe(
         trace('auth'),