GH Actions/test: fix PHP 5.6 on Win is running into memory limit issues

Author: jrfnl

.github/workflows/test.yml

@@ -225,9 +225,13 @@ jobs:
       - name: 'PHPCS: set the path to PHP'
         run: php "bin/phpcs" --config-set php_path php
 
+      # By default, the memory limit should be disabled with setup_php, but we've seen issues with this on
+      # PHP 5.6 in Windows, so let's set it to try and get round those issues.
       - name: 'PHPUnit: run the full test suite without code coverage'
         if: ${{ matrix.skip_tests != true }}
-        run: php "vendor/bin/phpunit" tests/AllTests.php --no-coverage
+        run: >
+          php "vendor/bin/phpunit" tests/AllTests.php --no-coverage
+          ${{ matrix.os == 'windows-latest' && startsWith( matrix.php, '5.' ) && '-d memory_limit=-1' || '' }}
 
       # Do one test run against the complete test suite in CBF mode to ensure all tests can run in CBF mode.
       - name: 'PHPUnit: run the full test suite without code coverage in CBF mode (PHP 8.3 only)'