message: Bump required CMake version to 3.5.1
diff: # -*- mode:cmake -*-
  -cmake_minimum_required(VERSION 3.0)
  +cmake_minimum_required(VERSION 3.5.1)
  set(FLATBUFFERS_BUILD_TESTS OFF CACHE BOOL "Skip flatbuffers' tests")
  add_subdirectory(third_party/flatbuffers EXCLUDE_FROM_ALL)
  