[Dependabot] Update phpunit/phpunit requirement from 8.5.53 to 8.5.54 (#1613)

Updates the requirements on [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) to permit the latest version.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/8.5.54/ChangeLog-8.5.md)
- [Commits](sebastianbergmann/phpunit@8.5.53...8.5.54)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-version: 8.5.54
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

composer.json

@@ -33,7 +33,7 @@
         "phpstan/phpstan": "1.12.33 || 2.2.7",
         "phpstan/phpstan-phpunit": "1.4.2 || 2.0.18",
         "phpstan/phpstan-strict-rules": "1.6.2 || 2.0.12",
-        "phpunit/phpunit": "8.5.53",
+        "phpunit/phpunit": "8.5.54",
         "rawr/phpunit-data-provider": "3.3.1",
         "rector/rector": "1.2.10 || 2.6.2",
         "rector/type-perfect": "1.0.0 || 2.1.4",