This functionality will be improved with the release of cmake-3.15.
CMAKE_MSVC_RUNTIME_LIBRARYCMP0091
It should be a matter of setting CMAKE_MSVC_RUNTIME_LIBRARY, for example (from docs) to set “multi-threaded statically-linked runtime library with or without debug information depending on the configuration”:
set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")