loongson/pypi: links for isort-plus

loongson/mirror isort-plus-5.1.3.tar.gz
loongson/mirror isort-plus-5.1.2.tar.gz
loongson/mirror isort-plus-5.1.1.tar.gz
loongson/mirror isort-plus-5.1.0.tar.gz
loongson/mirror isort-plus-5.0.0.tar.gz