Build(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@1.0.7...1.0.8)

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

composer.json

@@ -28,7 +28,7 @@
   },
   "require-dev": {
     "infection/infection": "~0.13.6 || ~0.18",
-    "mimmi20/coding-standard": "~1.0.7",
+    "mimmi20/coding-standard": "~1.0.8",
     "pepakriz/phpstan-exception-rules": "~0.11.3",
     "phpstan/extension-installer": "~1.1.0",
     "phpstan/phpstan": "~0.12.65",