Improve tests

.github/workflows/php.yml

@@ -11,6 +11,17 @@ jobs:
 
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+      matrix:
+        php-version:
+          - "8.1"
+          - "8.2"
+          - "8.3"
+        dependency-versions:
+          - "lowest"
+          - "highest"
+
     steps:
     - uses: actions/checkout@v2
 
@@ -27,14 +38,15 @@ jobs:
 #          ${{ runner.os }}-php-
 
     - name: Install dependencies
-#      if: steps.composer-cache.outputs.cache-hit != 'true'
-      run: composer install --prefer-dist --no-progress --no-suggest
+      uses: "ramsey/composer-install@v3"
+      with:
+        dependency-versions: ${{ matrix.dependency-versions }}
 
     - name: PHPUnit tests
       uses: php-actions/phpunit@v2
       with:
         configuration: phpunit.xml
-        php_version: 8.1
+        php_version: ${{ matrix.php-version }}
         version: 9
 
     - name: Run PHPStan