PHPStan fails because DrupalFinder relies on composer.json properties to detect DrupalRoot

[gardon]

I was trying to use this to run PHPStan on a contrib project (feeds) and after some debugging I got to webflo/drupal-finder which fails to detect Drupal Root because it loads the composer.json from the module instead, and cannot find the installer-paths property that it uses to detect the root.

[gardon]

Not sure about the implication, but running ddev expand-composer-json allows me to run PHPStan

[weitzman]

Dupe of #14