composer(deps-dev): update mimmi20/coding-standard requirement

Updates the requirements on [mimmi20/coding-standard](https://github.com/mimmi20/coding-standard) to permit the latest version.
- [Release notes](https://github.com/mimmi20/coding-standard/releases)
- [Commits](mimmi20/coding-standard@6.0.1...6.0.3)

---
updated-dependencies:
- dependency-name: mimmi20/coding-standard
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -43,7 +43,7 @@
     "laminas/laminas-modulemanager": "^2.17.0",
     "laminas/laminas-servicemanager": "^3.22.1",
     "mikey179/vfsstream": "^1.6.12",
-    "mimmi20/coding-standard": "^6.0.1",
+    "mimmi20/coding-standard": "^6.0.3",
     "mimmi20/monolog-callbackfilterhandler": "^4.0.0",
     "nikic/php-parser": "^5.4.0",
     "php-console/php-console": "^3.1.8",