composer(deps): update friendsofphp/php-cs-fixer requirement (#121)

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

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

composer.json

@@ -34,7 +34,7 @@
     "php": "^7.4.3 || ^8.0.0",
     "dealerdirect/phpcodesniffer-composer-installer": "^0.7.2",
     "doctrine/coding-standard": "^9.0.0",
-    "friendsofphp/php-cs-fixer": "^3.6.0",
+    "friendsofphp/php-cs-fixer": "^3.7.0",
     "slevomat/coding-standard": "^7.0.19",
     "squizlabs/php_codesniffer": "^3.6.2"
   },