events$ observable updates before other observables are updated

[leonluc-dev]

Currently the events$ observable fires before any of the properties in the auth-service are updated.
This causes issues when we want to do authenticated actions from the event handlers.
For example:

authService.events$.subscribe((event) => {
    if(event.action === AuthActions.SignInSuccess) {
        authService.loadUserInfo();
    }
}); 

This will cause the loadUserInfo call to fail since the token isn't set yet.

[leonluc-dev]

I've opened a PR #153 that would fix this issue