`ConfirmationsController` doesn't use `redirect_options` properly

https://github.com/lynndylanhurley/devise_token_auth/blob/bcdc3a5964086b6a08f3f98eb878a107af1334da/app/controllers/devise_token_auth/confirmations_controller.rb#L30

I think the above line should be
```ruby
redirect_to DeviseTokenAuth::Url.generate(redirect_url, { account_confirmation_success: false }.merge(redirect_options))
```
because right now `redirect_options` are not passed as query params.