Probably don't need `composer/installers` under composer v2?

Personne n'a encore pris cette issue.

Seems like this might be the cause of `composer install` creating a `/Plugin` root folder and installing every package that [has a `type: cakephp-plugin` in their own `composer.json`](https://github.com/loadsys/CakePHP-ConfigReadShell/blob/7a4a69d0f65c3ba70f8eccb0c768becacf32dd6a/composer.json#L4) into that (tracked) folder.

It's not clear to me how to detect whether this plugin is being `composer install`ed via composer v1 or v2, but on the `master / 4.x` branch it's probably safe to [remove `composer/installers` from the `composer.json` file](https://github.com/loadsys/CakePHP-ConfigReadShell/blob/7a4a69d0f65c3ba70f8eccb0c768becacf32dd6a/composer.json#L25) in THIS project.

The issue is fixed when a different project that runs `composer require loadsys/cakephp-config-read:~4.0` should NOT end up with a root `Plugin/` folder when running `composer install`.

Commencez par composer.json, en particulier par l’entrée composer/installers autour de la ligne référencée, et reproduisez l’installation depuis un autre projet nécessitant loadsys/cakephp-config-read:~4.0. Confirmez que la dépendance n’est pas nécessaire pour la configuration master/4.x, puis vérifiez que composer install ne crée plus de dossier Plugin/ à la racine et n’y installe plus de paquets cakephp-plugin.

Rédigé par le modèle d'indexation à partir du texte de l'issue.