loongson/pypi: links for pyradau13

loongson/mirror pyradau13-0.5.tar.gz
loongson/mirror pyradau13-0.4.1.tar.gz
loongson/mirror pyradau13-0.4.tar.gz
loongson/mirror pyradau13-0.3.tar.gz
loongson/mirror pyradau13-0.2.tar.gz
loongson/mirror pyradau13-0.1.tar.gz