Cannot do query-param-only transition

[lougreenwood]

The router service allows query-param only transitions:

    this.router.transitionTo({
      queryParams: { commentsAfter: latestComment }
    });

However, the logic for EngineRouterService does not handle this: https://github.com/villander/ember-engines-router-service/blob/master/addon/services/engine-router-service.js#L64

The problem seems to be that if routeName does not resemble a URL, it still tries to use routeName as the arg.

[villander]

@lougreenwood could you please provide a minimal reproduction?

[villander]

I'm closing this issue for inactivity and will reopen once someone reply with a minimal reproduction 😄