loongson/pypi: links for hgvs2seq

loongson/mirror hgvs2seq-0.2.1b0.tar.gz
loongson/mirror hgvs2seq-0.2.1b0-py3-none-any.whl
loongson/mirror hgvs2seq-0.2.0b0.tar.gz
loongson/mirror hgvs2seq-0.2.0b0-py3-none-any.whl