loongson/pypi: links for currency-exchange

loongson/mirror currency_exchange-1.0.0.tar.gz
loongson/mirror currency_exchange-1.0.0-py39-none-any.whl
loongson/mirror currency_exchange-1.0.0-py38-none-any.whl
loongson/mirror currency_exchange-1.0.0-py37-none-any.whl
loongson/mirror currency_exchange-1.0.0-py36-none-any.whl