loongson/pypi: links for webdataset-latch

loongson/mirror webdataset_latch-0.6.0.tar.gz
loongson/mirror webdataset_latch-0.6.0-py3-none-any.whl
loongson/mirror webdataset_latch-0.5.0.tar.gz
loongson/mirror webdataset_latch-0.5.0-py3-none-any.whl
loongson/mirror webdataset_latch-0.4.0-py3-none-macosx_10_9_x86_64.whl
loongson/mirror webdataset_latch-0.3.0-py3-none-macosx_10_9_x86_64.whl