Use PHPUnit

Author: kubawerlos

.github/workflows/ci.yaml

@@ -23,7 +23,11 @@ jobs:
       - uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php-version }}
-          extensions: none
+          extensions: none, mbstring
 
       - run: composer update
-      - run: vendor/bin/simple-phpunit
+
+      - if: matrix.php-version != '7.4' && matrix.php-version != '8.0' # These run PHPUnit 9, which does not have the option
+        run: vendor/bin/phpunit --check-php-configuration
+
+      - run: vendor/bin/phpunit --no-configuration tests

composer.json

@@ -17,7 +17,7 @@
         "php": "^5.6 || ^7.0 || ^8.0"
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "^5.1 || ^7.3.1"
+        "phpunit/phpunit": "^9.6.23 || ^10.5.47 || ^11.5.33"
     },
     "config": {
         "optimize-autoloader": true,