root/pypi: links for rtmbot-mattermost

root/pypi rtmbot-mattermost-0.5.2.tar.gz
root/pypi rtmbot-mattermost-0.5.1.tar.gz
root/pypi rtmbot-mattermost-0.5.tar.gz
root/pypi rtmbot-mattermost-0.4.2.tar.gz