Mroonga CMake Deprecation Warning

CMake Deprecation Warning at storage/mroonga/vendor/groonga/CMakeLists.txt:18 (cmake_minimum_required):

  Compatibility with CMake < 2.8.12 will be removed from a future version of

  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell

  CMake that the project does not need compatibility with older versions.

cmake_minimum_required(VERSION 2.6.2)