message: integration_tests: use correct flag for MSVC
diff: @@ -7,9 +7,15 @@ include_directories(
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DTESTING")
  +if(MSVC)
  + add_compile_options(
  + /wd4996 # ignore deprecated
  + )
  +else()
  add_compile_options(
  -Wno-error=deprecated-declarations
  )
  +endif()
  # `make test` does not show output, but `make check` does
  add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --verbose)
  