Update tests.yml

Bumping gha actions versions

Author: qschmick

.github/workflows/tests.yml

@@ -21,10 +21,10 @@ jobs:
 
         steps:
             - name: Checkout code
-              uses: actions/checkout@v2
+              uses: actions/checkout@v4
 
             - name: Cache dependencies
-              uses: actions/cache@v1
+              uses: actions/cache@v4
               with:
                   path: ~/.composer/cache/files
                   key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}