message: include CTest before ranges_options
diff: @@ -38,11 +38,11 @@ target_include_directories(range-v3 INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_
  target_include_directories(range-v3 SYSTEM INTERFACE $<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include>)
  target_link_libraries(range-v3 INTERFACE concepts meta)
  +include(CTest) # invokes enable_testing() and defines BUILD_TESTING variable, defaulting to ON
  include(TestHeaders)
  include(ranges_options)
  include(ranges_env)
  include(ranges_flags)
  -include(CTest)
  # Test for <thread>
  try_compile(RANGE_V3_TRY_THREAD ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/thread_test_code.cpp)
  