build(deps-dev): update friendsofphp/php-cs-fixer requirement

Updates the requirements on friendsofphp/php-cs-fixer to permit the latest version.

---
updated-dependencies:
- dependency-name: friendsofphp/php-cs-fixer
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -17,7 +17,7 @@
     "require-dev": {
         "codeigniter/coding-standard": "^1.5",
         "fakerphp/faker": "^1.9",
-        "friendsofphp/php-cs-fixer": "~3.12.0",
+        "friendsofphp/php-cs-fixer": "~3.13.0",
         "mikey179/vfsstream": "^1.6",
         "nexusphp/cs-config": "^3.6",
         "nexusphp/tachycardia": "^1.0",