Fork for PHP8.1 + Composer V2

[nopenopenope]

Leaving this here since the repository is not maintained anymore actively. I invested some time to make this up-to-date and well-running with Composer v2, as the deprecation notice annoyed me.

-> https://github.com/nopenopenope/webroot-installer

Note: this plugin works still fine - if you take a look at what it does, Composer V2 has no impact on the Plugin itself. It just throws the deprecation note.