Updateworkflows cache

Author: indjeto

.github/workflows/phpunit.yml

@@ -37,7 +37,7 @@ jobs:
 
             -   name: Cache Composer packages
                 id: composer-cache
-                uses: actions/cache@v2
+                uses: actions/cache@v4
                 with:
                     path: vendor
                     key: ${{ matrix.php }}-composer-${{ hashFiles('**/composer.lock') }}