GH Actions: update PHP versions in workflows

PHP 8.2 and 8.3 have been released quite a while ago and PHP 8.4 is expected towards end of November, so adding PHP 8.3 and 8.4 to the matrix and no longer allowing PHP 8.2 or 8.3 to fail the build.

Builds against PHP 8.4 are still allowed to fail for now.

.github/workflows/ci.yml

@@ -37,9 +37,9 @@ jobs:
     strategy:
       matrix:
         operating-system: ['ubuntu-latest']
-        php-versions: ['7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+        php-versions: ['7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
 
-    continue-on-error: ${{ matrix.php-versions == '8.2' }}
+    continue-on-error: ${{ matrix.php-versions == '8.4' }}
 
     steps:
       - name: Checkout
@@ -56,12 +56,12 @@ jobs:
       - name: Modernize dependencies
         run: composer require --dev --no-update "phpunit/phpunit:>=4"
 
-      - name: Install Composer dependencies (PHP < 8.2)
-        if: ${{ matrix.php-versions != '8.2' }}
+      - name: Install Composer dependencies (PHP < 8.4)
+        if: ${{ matrix.php-versions != '8.4' }}
         uses: "ramsey/composer-install@v2"
 
-      - name: Install Composer dependencies - ignore-platform-reqs (PHP 8.2)
-        if: ${{ matrix.php-versions == '8.2' }}
+      - name: Install Composer dependencies - ignore-platform-reqs (PHP 8.4)
+        if: ${{ matrix.php-versions == '8.4' }}
         uses: "ramsey/composer-install@v2"
         with:
           composer-options: --ignore-platform-reqs