loongson/pypi: links for pumpkinlb

loongson/mirror PumpkinLB-2.0.0.tar.gz
loongson/mirror PumpkinLB-1.4.0.tar.gz
loongson/mirror PumpkinLB-1.4.tar.gz
loongson/mirror PumpkinLB-1.3.tar.gz
loongson/mirror PumpkinLB-1.2.1.tar.gz
loongson/mirror PumpkinLB-1.2.tar.gz