CMake: fix CMake version check on windows (#240)
CMake: fix CMake version check on windows (#240)

CMake was telling that my version 3.10.1 is lesser thar 3.4
KjellKod/g3log,KjellKod/g3log,colorer/g3log,AbberiorInstruments/g3log,AbberiorInstruments/g3log,colorer/g3log,ctapmex/g3log,ctapmex/g3log,jkhoogland/g3log,jkhoogland/g3log