compressor: use PyObject_CallObject() for ZstdCompressionWriter
compressor: use PyObject_CallObject() for ZstdCompressionWriter
terrelln/python-zstandard,terrelln/python-zstandard,indygreg/python-zstandard,indygreg/python-zstandard,indygreg/python-zstandard,terrelln/python-zstandard,terrelln/python-zstandard,indygreg/python-zstandard