Extend attribute and item accessor interface using object_api
diff --git a/tests/constructor_stats.h b/tests/constructor_stats.h
index 69e385e..5dd215f 100644
--- a/tests/constructor_stats.h
+++ b/tests/constructor_stats.h
@@ -103,7 +103,7 @@
 
     int alive() {
         // Force garbage collection to ensure any pending destructors are invoked:
-        py::module::import("gc").attr("collect").operator py::object()();
+        py::module::import("gc").attr("collect")();
         int total = 0;
         for (const auto &p : _instances) if (p.second > 0) total += p.second;
         return total;