suppress C4819 warning/error from windows build

Author: luk036

test/CMakeLists.txt

@@ -22,7 +22,7 @@ set_target_properties(${PROJECT_NAME}Tests PROPERTIES CXX_STANDARD 17)
 if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
   target_compile_options(${PROJECT_NAME} PUBLIC -Wall -Wpedantic -Wextra -Werror)
 elseif(MSVC)
-  target_compile_options(${PROJECT_NAME} PUBLIC /W4 /WX)
+  target_compile_options(${PROJECT_NAME} PUBLIC /W4 /WX /wd4819)
   target_compile_definitions(${PROJECT_NAME}Tests PUBLIC DOCTEST_CONFIG_USE_STD_HEADERS)
 endif()