composer(deps-dev): Bump phpunit/phpunit from 10.5.19 to 10.5.20

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 10.5.19 to 10.5.20.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.5.20/ChangeLog-10.5.md)
- [Commits](sebastianbergmann/phpunit@10.5.19...10.5.20)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -34,7 +34,7 @@
     "ergebnis/phpunit-slow-test-detector": "^2.14.0",
     "fakerphp/faker": "^1.23.1",
     "infection/infection": "~0.27.11",
-    "phpunit/phpunit": "^10.5.19",
+    "phpunit/phpunit": "^10.5.20",
     "psalm/plugin-phpunit": "~0.19.0",
     "rector/rector": "^1.0.4",
     "roave/backward-compatibility-check": "^8.6.0",