loongson/pypi: links for downloader-plus

loongson/mirror Downloader_plus-0.0.4.tar.gz
loongson/mirror Downloader_plus-0.0.4-py3.7.egg
loongson/mirror Downloader_plus-0.0.4-py3-none-any.whl
loongson/mirror Downloader_plus-0.0.3.tar.gz
loongson/mirror Downloader_plus-0.0.3-py3.7.egg
loongson/mirror Downloader_plus-0.0.3-py3-none-any.whl