Remove fail-on-error

Author: tvdijen

.github/workflows/php.yml

@@ -279,3 +279,11 @@ jobs:
       - uses: geekyeggo/delete-artifact@v5
         with:
           name: coverage-data
+
+      - name: PHPStan
+        run: |
+          vendor/bin/phpstan analyze -c phpstan.neon
+
+      - name: PHPStan (testsuite)
+        run: |
+          vendor/bin/phpstan analyze -c phpstan-dev.neon