Use Python 3.9 in CI
Use Python 3.9 in CI

indico/indico,pferreir/indico,DirkHoffmann/indico,indico/indico,DirkHoffmann/indico,indico/indico,ThiefMaster/indico,pferreir/indico,pferreir/indico,ThiefMaster/indico,ThiefMaster/indico,DirkHoffmann/indico,ThiefMaster/indico,indico/indico,pferreir/indico,DirkHoffmann/indico