message: construction_worker: adding status messages
diff: -option(JSON_Sanitizer "Build with Clang Sanitizer" OFF)
  -option(JSON_Valgrind "Execute tests with Valgrind" OFF)
  +option(JSON_Sanitizer "Build test suite with Clang sanitizer" OFF)
  +option(JSON_Valgrind "Execute test suite with Valgrind" OFF)
  if(JSON_Sanitizer)
  + message(STATUS "Building test suite with Clang sanitizer")
  if(NOT MSVC)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -O2 -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer")
  endif()
  @@ -9,6 +10,7 @@ endif()
  if(JSON_Valgrind)
  find_program(CMAKE_MEMORYCHECK_COMMAND valgrind)
  + message(STATUS "Executing test suite with Valgrind (${CMAKE_MEMORYCHECK_COMMAND})")
  set(MEMORYCHECK_COMMAND_OPTIONS "--error-exitcode=1 --leak-check=full")
  set(memcheck_command "${CMAKE_MEMORYCHECK_COMMAND} ${CMAKE_MEMORYCHECK_COMMAND_OPTIONS}")
  separate_arguments(memcheck_command)
  