update Github actions

Author: josiasmontag

.github/workflows/run-tests.yml

@@ -14,13 +14,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ["8.3", "8.2", "8.1", "8.0", "7.4"]
+        php: ["8.4", "8.3", "8.2", "8.1", "8.0", "7.4"]
 
     steps:
       - uses: actions/checkout@v2
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.composer/cache/files
           key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}