Array params are lost when constructing URLs

[sfnelson]

Bug description

When using an asynchronous path that includes array params, the generated URL for pagination converts the key from an array to a single value.

To Reproduce

Steps to reproduce the behavior:

1. Pass a URL to combobox tag that includes an array param, e.g. countries_path(continents: ["Asia"])
2. Open the combobox from the frontend
3. Note that the requested path is /countries?continents[]=Asia
4. Countries controller generates options via helpers.hw_async_combobox_options(countries, next_page: 2)
5. See that the requested URL for pagination is /countries?continents=Asia&page=2

Expected behavior

The requested URL for pagination should be /countries?continents[]=Asia&page=2

Version Numbers

HotwireCombobox info

• Gem version: v0.3.2

Context

Pagy gem demonstrates an alternative way of safely constructing URLs using Rack::Utils.build_nested_query that might be helpful. See https://github.com/ddnexus/pagy/blob/master/gem/lib/pagy/url_helpers.rb