Update phlak/semver requirement

Updates the requirements on [phlak/semver](https://github.com/PHLAK/SemVer) to permit the latest version.
- [Release notes](https://github.com/PHLAK/SemVer/releases)
- [Commits](PHLAK/SemVer@4.1.0...6.0.0)

---
updated-dependencies:
- dependency-name: phlak/semver
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

composer.json

@@ -57,7 +57,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.0",
         "mockery/mockery": "^1.0",
-        "phlak/semver": "^4.1",
+        "phlak/semver": "^4.1 || ^6.0",
         "php-mock/php-mock-phpunit": "^2.7||^1.1",
         "phpstan/phpstan": "^1.11",
         "phpunit/phpunit": "^11.2.6||^10.5.25",