drop support for VS 2013 due to spurious warnings about conditional expressions being constant
drop support for VS 2013 due to spurious warnings about conditional expressions being constant

TyRoXx/Lpg,mamazu/Lpg,TyRoXx/Lpg,TyRoXx/Lpg,mamazu/Lpg,mamazu/Lpg,TyRoXx/Lpg,TyRoXx/Lpg,mamazu/Lpg