Uses deprecated API PyEval_CallObjectWithKeywords, raises warnings under 3.9 and 3.10

[jamadden]

As described in zopefoundation/zope.container#40, this project contains a use of a deprecated API (PyEval_CallObjectWithKeywords) that could be removed soon:

zope.proxy/src/zope/proxy/_zope_proxy_proxy.c

Lines 377 to 382 in 9424b6e

	static PyObject *
	wrap_call(PyObject *self, PyObject *args, PyObject *kw)
	{
	if (kw)
	return PyEval_CallObjectWithKeywords(Proxy_GET_OBJECT(self),
	args, kw);

I think there's a simple drop-in replacement API, I remember running into this as a warning under 3.9 and making a change in…some project.

[tseaver]

Via PR #65.