Support both progressbar and progressbar2
    
    These libraries are not 100% compatible, so this adds runtime
    detection and adapts to support both of them.
    
    Related:
    https://bugzilla.redhat.com/show_bug.cgi?id=1654746
    https://bugzilla.redhat.com/show_bug.cgi?id=1661676
    
    Merges: https://pagure.io/taskotron/libtaskotron/pull-request/427