Update dependency friendsofphp/php-cs-fixer to v3.21.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
friendsofphp/php-cs-fixer	require-dev	minor	3.20.0 -> 3.21.1

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Release Notes

PHP-CS-Fixer/PHP-CS-Fixer (friendsofphp/php-cs-fixer)

### [`v3.21.1`](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/releases/tag/v3.21.1): Triangle [Compare Source](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/compare/v3.21.0...v3.21.1) experimental release - Require PHP ^8.0.1 ### [`v3.21.0`](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/blob/HEAD/CHANGELOG.md#Changelog-for-v3210) [Compare Source](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/compare/v3.20.0...v3.21.0) - bug: Fix and enhance Gitlab reporter ([#​7089](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7089)) - bug: Import with different case must not be removed by non-risky fixer ([#​7095](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7095)) - bug: ordered imports fixer top group only ([#​7023](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7023)) - bug: `FinalPublicMethodForAbstractClassFixer` - fix for readonly classes ([#​7123](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7123)) - DX: do not nest ".editorconfig" files ([#​7112](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7112)) - DX: exclude Dockerfile from dist ([#​7113](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7113)) - DX: fix checkbashisms installation ([#​7102](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7102)) - DX: fix Smoke tests for various git default branch name ([#​7119](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7119)) - DX: Fix `FileRemovalTest` (do not fail when running it standalone) ([#​7104](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7104)) - DX: Progress output refactor ([#​6848](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/6848)) - DX: Rename abstract test classes to `*TestCase` convention ([#​7100](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7100)) - DX: test all PHPUnit migration sets ([#​7107](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7107)) - DX: \[Docker] Distinguish Alpine version between PHP versions ([#​7105](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7105)) - feature: Create cache path if it does not exist ([#​7109](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7109)) - feature: Introduce `NullableTypeDeclarationFixer` ([#​7002](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7002)) - feature: Introduce `TypeDeclarationSpacesFixer` ([#​7001](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7001)) - feature: `BlankLineBetweenImportGroupsFixer` - keep indent ([#​7122](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7122)) - minor: Parse callable using full phpdoc grammar ([#​7094](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7094)) - minor: PHP8.3 const type tokenizing ([#​7055](https://togithub.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7055))

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