fix: mirtk_target_dependencies unset dep_attr [CMake]
fix: mirtk_target_dependencies unset dep_attr [CMake]

BioMedIA/MIRTK,BioMedIA/MIRTK,schuhschuh/MIRTK,BioMedIA/MIRTK,stefanpsz/MIRTK,stefanpsz/MIRTK,BioMedIA/MIRTK,schuhschuh/MIRTK,schuhschuh/MIRTK,stefanpsz/MIRTK,stefanpsz/MIRTK,schuhschuh/MIRTK