Revert dynamic lib build options. It only make effects only once on win.

CMakeLists.txt

@@ -8,24 +8,18 @@ if (EMSCRIPTEN)
 	set(CRU_DEFAULT_BUILD_SHARED_LIBS OFF)
 endif()
 
-option(CRU_BUILD_SHARED_LIBS "Try to build shared libraries as default" ${CRU_DEFAULT_BUILD_SHARED_LIBS})
+option(BUILD_SHARED_LIBS "Try to build shared libraries as default" ${CRU_DEFAULT_BUILD_SHARED_LIBS})
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
-set(BUILD_SHARED_LIBS ${CRU_BUILD_SHARED_LIBS})
-
 project(cru)
 
 if (APPLE)
 	include_directories(BEFORE SYSTEM "/usr/local/include")
 endif()
 
-# Catch2 must be compiled as static library
-set(BUILD_SHARED_LIBS OFF)
 add_subdirectory(lib/Catch2)
-set(BUILD_SHARED_LIBS ${CRU_BUILD_SHARED_LIBS})
-
 add_subdirectory(lib/double-conversion)
 add_subdirectory(lib/GSL)