build with PHP 8.3 but allow failure

Author: Frank Kleine

.github/workflows/runTests.yml

@@ -10,10 +10,11 @@ jobs:
   tests:
     name: PHP ${{ matrix.php-versions }} on ${{ matrix.os }} w/ ${{ matrix.dependencies }}
     runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ matrix.php-versions == '8.3' }}
     strategy:
       fail-fast: false
       matrix:
-        php-versions: ['8.0', '8.1', '8.2']
+        php-versions: ['8.0', '8.1', '8.2', '8.3']
         os: [ubuntu-latest, windows-latest, macOS-latest]
         dependencies: ['install', 'update --prefer-lowest', 'update']