Switch from webmozart/path-util to new package symfony/filesystem

Think this will do it.

Patch on #2 works for me.

Do you have any idea when this modification will be validated and packaged in a new version of the module?

For people who have automated tests in a CI, for example with composer audit, the webmozart//path-util package appears as abandoned and so CIs often fail.

Two positive reviews.

Any chance of this and https://www.drupal.org/i/3485647 → getting merged some time soon?

Because yes, drush language:* is mostly a replacement for this module, but there is some convenience stuff in here that would be cool to keep!