e5b6700 add direct requirement for python3-cairocffi (#1685654)

Authored and Committed by fschwarz 5 years ago
    add direct requirement for python3-cairocffi (#1685654)
    
    Actually python3-cairocffi should have that dependency (see bug 1698217) but
    for now just add the requirement here.
    
        
file modified
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