root/pypi: links for xcollection

root/pypi xcollection-2021.12.23.tar.gz
root/pypi xcollection-2021.12.23-py3-none-any.whl
root/pypi xcollection-2021.12.1.tar.gz
root/pypi xcollection-2021.12.1-py3-none-any.whl
root/pypi xcollection-2021.11.24.tar.gz
root/pypi xcollection-2021.11.24-py3-none-any.whl