message: cmake: Fix rapidJSON version detection
diff: @@ -150,13 +150,21 @@ set_property(SOURCE src/utils.cc APPEND PROPERTY COMPILE_DEFINITIONS
  ### Includes
  if(USE_SYSTEM_RAPIDJSON)
  - find_package(RapidJSON QUIET)
  + set(RapidJSON_MIN_VERSION "1.1.0")
  + find_package(RapidJSON ${RapidJSON_MIN_VERSION} QUIET)
  if(NOT DEFINED RapidJSON_INCLUDE_DIRS AND DEFINED RAPIDJSON_INCLUDE_DIRS)
  - message(FATAL_ERROR "RapidJSON version is likely too old. See https://github.com/MaskRay/ccls/issues/455")
  + set(RapidJSON_INCLUDE_DIRS "${RAPIDJSON_INCLUDE_DIRS}")
  endif()
  endif()
  if(NOT RapidJSON_FOUND)
  + if(EXISTS "${CMAKE_SOURCE_DIR}/third_party/rapidjson/include")
  + message(STATUS "Using local RapidJSON")
  set(RapidJSON_INCLUDE_DIRS third_party/rapidjson/include)
  + else()
  + message(STATUS "Plase initialize rapidJSON git submodule as currently installed version is to old:")
  + message(STATUS "git submodule init && git submodule update")
  + message(FATAL_ERROR "RapidJSON version is likely too old. See https://github.com/MaskRay/ccls/issues/455")
  + endif()
  endif()
  target_include_directories(ccls PRIVATE src)
  