update gh workflow + add PHP 8.2 test

.github/workflows/php-test.yml

@@ -20,12 +20,12 @@ jobs:
             composer-flags: '--prefer-lowest'
           - php: '8.0'
           - php: '8.1'
-          #- php: '8.2' # TODO make sure if this step fails the build is not marked as failing, maybe the `continue-on-error` flag?
+          - php: '8.2'
     # Steps represent a sequence of tasks that will be executed as part of the job
     name: "PHP${{ matrix.php }} ${{ matrix.composer-flags }}"
     steps:
       - name: Checkout source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2
@@ -40,7 +40,7 @@ jobs:
 
       - name: Cache Composer packages
         id: composer-cache
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: vendor
           key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}