loongson/pypi: links for propositiontable

loongson/mirror PropositionTable-0.0.4rc2.tar.gz
loongson/mirror PropositionTable-0.0.4rc2-py3-none-any.whl
loongson/mirror PropositionTable-0.0.4rc1.tar.gz
loongson/mirror PropositionTable-0.0.4rc1-py3-none-any.whl
loongson/mirror PropositionTable-0.0.3b0.tar.gz
loongson/mirror PropositionTable-0.0.3b0-py3-none-any.whl