loongson/mirror: links for plover-melani

loongson/mirror plover_melani-0.6.0.tar.gz
loongson/mirror plover_melani-0.6.0-py3-none-any.whl
loongson/mirror plover_melani-0.5.8.tar.gz
loongson/mirror plover_melani-0.5.8-py3-none-any.whl