Codingstyle cache file in distribution tarball

[hannob]

Describe the bug

The download tarball (notes.tar.gz) contains a file named .php_cs.cache.

This is an artifact of the PHP-CS-Fixer tool, a codingstyle checker for PHP. I assume this was added by mistake, as there seems no point to ship such a cache file in a release. You may want to make sure to do something in your tarball creation pipeline to avoid this more generally.

The file does not seem to be part of the repo. You still may want to consider adding it to .gitignore.

To be clear: This file is not harmful, it's just a useless artifact.