Switch to PHP_CodeSniffer v3.8.0

Unfortunately, `quizlabs/php_codesniffer` is officially abandoned.
A fork has been created at `phpcsstandards/php_codesniffer`.

As such, we now require `PHP_CodeSniffer` v3.8.0 or later. This
version fixes a lot of things and also adds support for PHP 8.3.

The default PHP version for the action is now PHP 8.3. This does
not impact downstream dependencies of this action as long as they
properly configured the version constraints.

.github/workflows/coding-standards.yml

@@ -5,7 +5,7 @@ on:
         inputs:
             php-version:
                 description: 'The PHP version to use when running the job'
-                default: '8.2'
+                default: '8.3'
                 required: false
                 type: 'string'
 

README.md

@@ -1,3 +1,3 @@
 # GEWISPHP Coding Standards
 
-The GEWISPHP Coding Standard is a set of [PHP_CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer) rules that are applied to all PHP projects of Study Association GEWIS. These standards are heavily based on the [Doctrine Coding Standard](https://github.com/doctrine/coding-standard) and the [Slevomat Coding Standard](https://github.com/slevomat/coding-standard).
+The GEWISPHP Coding Standard is a set of [PHP_CodeSniffer](https://github.com/PHPCSStandards/PHP_CodeSniffer) rules that are applied to all PHP projects of Study Association GEWIS. These standards are heavily based on the [Doctrine Coding Standard](https://github.com/doctrine/coding-standard) and the [Slevomat Coding Standard](https://github.com/slevomat/coding-standard).

composer.json

@@ -12,8 +12,8 @@
     "require": {
         "php": "^8.2",
         "dealerdirect/phpcodesniffer-composer-installer": "^1.0.0",
-        "slevomat/coding-standard": "^8.11",
-        "squizlabs/php_codesniffer": "^3.7.0"
+        "slevomat/coding-standard": "^8.14.0",
+        "squizlabs/php_codesniffer": "^3.8.0"
     },
     "config": {
         "allow-plugins": {