diff-format option has been removed. udiff is the default
now since v3.

composer u friendsofphp/php-cs-fixer composer/xdebug-handler php-cs-fixer/diff
composer req --dev friendsofphp/php-cs-fixer:^3.0

Resolves: #94856
Releases: master
Change-Id: I33470fc49b4355130e73326c85323a1848fe3562
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70516


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>