loongson/pypi: links for schema-migrations

loongson/mirror schema-migrations-0.2.3.tar.gz
loongson/mirror schema-migrations-0.2.2.tar.gz
loongson/mirror schema-migrations-0.2.1.tar.gz
loongson/mirror schema-migrations-0.2.tar.gz
loongson/mirror schema-migrations-0.1.2.tar.gz
loongson/mirror schema-migrations-0.1.1.tar.gz
loongson/mirror schema-migrations-0.1.0.tar.gz
loongson/mirror schema-migrations-0.0.0.tar.gz