loongson/pypi: links for invoicer

loongson/mirror invoicer-0.1.0.tar.gz
loongson/mirror invoicer-0.1.0b33.tar.gz
loongson/mirror invoicer-0.1.0b32.tar.gz
loongson/mirror invoicer-0.1.0b30.tar.gz
loongson/mirror invoicer-0.1.0b21.tar.gz