Method operator delete

tests/test_factory_constructors.cpp:351–354

            return p;
        }
        static void operator delete(void *p) {
            py::print("operator delete called on", reinterpret_cast<uintptr_t>(p));
            ::operator delete(p);
        }
        int i;
    };
    // As of 2.2, `py::init<args>` no longer requires placement new