GH Actions: update PHP versions in workflows

PHP 8.2 has been released today 🎉 and the `setup-php` action has announced support for PHP 8.3, so adding PHP 8.3 to the matrix and no longer allowing PHP 8.2 to fail the build.

Builds against PHP 8.3 are still allowed to fail for now.

.github/workflows/integrationtest.yml

@@ -34,6 +34,7 @@ jobs:
           - '8.0'
           - '8.1'
           - '8.2'
+          - '8.3'
         composer:
           - 'v1'
           - 'v2'
@@ -70,6 +71,9 @@ jobs:
           - php: '8.2'
             composer: '2.2'
             os: 'ubuntu-latest'
+          - php: '8.3'
+            composer: '2.2'
+            os: 'ubuntu-latest'
 
           - php: '7.2'
             composer: '2.2'
@@ -89,6 +93,9 @@ jobs:
           - php: '8.2'
             composer: '2.2'
             os: 'windows-latest'
+          - php: '8.3'
+            composer: '2.2'
+            os: 'windows-latest'
 
           # Also test against the dev version of Composer for early warning about upcoming changes.
           - php: 'latest'
@@ -101,7 +108,7 @@ jobs:
 
     name: "Integration test"
 
-    continue-on-error: ${{ matrix.php == '8.2' || matrix.composer == 'snapshot' }}
+    continue-on-error: ${{ matrix.php == '8.3' || matrix.composer == 'snapshot' }}
 
     steps:
       - name: Checkout code
@@ -123,15 +130,15 @@ jobs:
       # Install dependencies and handle caching in one go.
       # @link https://github.com/marketplace/actions/install-composer-dependencies
       - name: Install Composer dependencies
-        if: ${{ matrix.php != '8.2' }}
+        if: ${{ matrix.php != '8.3' }}
         uses: "ramsey/composer-install@v2"
         with:
           composer-options: '--optimize-autoloader'
           # Bust the cache at least once a month - output format: YYYY-MM-DD.
           custom-cache-suffix: $(date -u -d "-0 month -$(($(date +%d)-1)) days" "+%F")
 
       - name: Install Composer dependencies
-        if: ${{ matrix.php == '8.2' }}
+        if: ${{ matrix.php == '8.3' }}
         uses: "ramsey/composer-install@v2"
         with:
           composer-options: '--ignore-platform-reqs --optimize-autoloader'