loongson/pypi: links for drf-serpy

loongson/mirror drf_serpy-0.5.0.tar.gz
loongson/mirror drf_serpy-0.5.0-py3-none-any.whl
loongson/mirror drf-serpy-0.4.5.tar.gz
loongson/mirror drf-serpy-0.4.4.tar.gz