Add Router state to RouterNavigatedPayload

[sbkpilot1]

Describe any alternatives/workarounds you're currently using

I had written this code to simulate the navigated action with v6, I want to switch to using the Router Navigated action now that it is supported in v7 router-store. However, my action handler requires access to the router state to query data associated with the activated route.

      // Temp - to workaround https://github.com/ngrx/platform/issues/975
       const serializer = new NgrxRouterStateSerializer();

    this.router.events.pipe(
       filter(e => e instanceof NavigationEnd)
      ).subscribe((e: NavigationEnd) => {
        const snapshot = this.router.routerState.snapshot;
        const routesRecognized: RoutesRecognized = new RoutesRecognized(e.id, e.url, e.urlAfterRedirects, snapshot);
        const routerStateData = serializer.serialize(snapshot);
        const routerNavigationPayload: RouterNavigationPayload<RouterStateData> = {
          routerState: routerStateData,
          event: routesRecognized
        };

        this.store.dispatch({
          type: ROUTER_NAVIGATED,
          payload: routerNavigationPayload
        });
    });

Other information:

If accepted, I would be willing to submit a PR for this feature

[ ] Yes (Assistance is provided if you need help submitting a pull request)
[ ] No

[geo242]

Yes please!