ci: update test dependencies

Author: thelfensdrfer

.github/workflows/tests.yml

@@ -9,21 +9,21 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         php-versions: ['8.2', '8.3', '8.4']
 
     name: PHPUnit ${{ matrix.php-versions }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Validate composer.json and composer.lock
       run: composer validate
 
     - name: Cache Composer packages
       id: composer-cache
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: vendor
         key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}