root/pypi: links for digital-filter-tools

root/pypi digital-filter-tools-0.4.1.tar.gz
root/pypi digital_filter_tools-0.4.1-py3-none-any.whl
root/pypi digital-filter-tools-0.4.0.tar.gz
root/pypi digital_filter_tools-0.4.0-py3-none-any.whl
root/pypi digital-filter-tools-0.3.9.tar.gz
root/pypi digital_filter_tools-0.3.9-py3-none-any.whl