loongson/mirror: links for flask-migrate-tw

loongson/mirror Flask-Migrate-tw-1.8.1.tar.gz
loongson/mirror Flask_Migrate_tw-1.8.1-py2.py3-none-any.whl
loongson/mirror Flask-Migrate-tw-1.8.0.tar.gz
loongson/mirror Flask_Migrate_tw-1.8.0-py2.py3-none-any.whl
loongson/mirror Flask_Migrate_tw-1.8.0-py2-none-any.whl