loongson/pypi: links for imgurdownloader

loongson/mirror ImgurDownloader-1.0.tar.gz
loongson/mirror ImgurDownloader-1.0-py3-none-any.whl
loongson/mirror ImgurDownloader-1.0.dev0.tar.gz
loongson/mirror ImgurDownloader-1.0.dev0-py3-none-any.whl