loongson/pypi: links for pycwt

loongson/mirror pycwt-0.5.0b0.tar.gz
loongson/mirror pycwt-0.5.0b0-py3-none-any.whl
loongson/mirror pycwt-0.4.0b0.tar.gz
loongson/mirror pycwt-0.4.0b0-py3-none-any.whl
loongson/mirror pycwt-0.3.0a22.tar.gz