cmake: dump minimal version
cmake: dump minimal version

Bug reported here: https://groups.google.com/d/msg/votca/Uz5qJVg3Al8/4UtacE0MEgAJ

votca/csg,votca/csg,junghans/csg,MrTheodor/csg,junghans/csg,junghans/csg,MrTheodor/csg,junghans/csg,votca/csg,MrTheodor/csg,junghans/csg,MrTheodor/csg,votca/csg,MrTheodor/csg,junghans/csg