adding 8.3 to build matrix

8.3 is in RC, so add it to the matrix. currently failing because many libraries do not
support it yet. bump 8.2 to non-experimental, which should have happened some time ago.

.github/workflows/php.yml

@@ -13,11 +13,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: ['7.4', '8.0', '8.1']
+        php-version: ['7.4', '8.0', '8.1', '8.2']
         experimental: [false]
+        composer_args: ""
         include:
-          - php-version: 8.2
+          - php-version: 8.3
             experimental: true
+            composer_args: "--ignore-platform-reqs"
 
     steps:
     - uses: actions/checkout@v3
@@ -44,7 +46,7 @@ jobs:
 
     - name: Install dependencies
       if: steps.composer-cache.outputs.cache-hit != 'true'
-      run: composer install --prefer-dist --no-progress --no-suggest
+      run: composer install --prefer-dist --no-progress --no-suggest ${{ matrix.composer_args }}
 
     - name: Check Style
       continue-on-error: ${{ matrix.experimental }}