root/pypi: links for url-shortener

root/pypi url_shortener-0.5.20.tar.gz
root/pypi url_shortener-0.5.18.tar.gz
root/pypi url_shortener-0.5.16.tar.gz
root/pypi url_shortener-0.5.10.tar.gz
root/pypi url_shortener-0.5.8.tar.gz