TYPO3 Core

PER-CS2.0 was added as clone of PER-CS1.0 in php-cs-fixer v3.27
in order to implement the new rules that are defined in
PER Coding Style 2.0 [1]. The alias PER has been pointed to
PER-CS2.0 although the current set of rules are not finished yet. [2]
There is only one rule (single_line_empty_body) that is done by now
and more will follow, so we rather pin to PER-CS1.0 for now (and
enable single_line_empty_body which we already migrated to) in
order to prevent having coding style changes with every
php-cs-fixer raise. We rather wait until the 2.0 preset has been
finished and is on par with the upstream php-fig definitions and
switch to it with one change.

[1] https://www.php-fig.org/per/coding-style/
[2] https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7247