Update to feed-io version 6

[ardentsword]

I assume there are plans to update this package to version 6 of feed-io as well?

If you could use help with this I can take a look as well, if so, could you give some pointers as what to look out for?

[ardentsword]

I have experimented with this a bit today, simply updating feed-io and modifying the services.yml to works perfectly:

    http.client:
        class: Symfony\Component\HttpClient\HttplugClient

    feedio.client:
        class: FeedIo\Adapter\Http\Client
        arguments: ['@http.client']

(And of course installing the symfony http client in this case with the psr-7 adapter, nyholm/psr7)
But my knowledge of symfony bundles is too limited here.

What would be a nice way to make this configurable?
-Manually injecting a service in the project service.yml seems very convoluted
-I though maybe about a sort of 'config factory', that injects to correct client adapter based on a configurable string?
-I also noticed php-http has a discovery plugin for this: https://docs.php-http.org/en/latest/discovery.html, perhaps that would be a nice default injection?
-I'm overthinking this massively?

Let me know what you think!