update cmake version

[nektro]

https://github.com/lloyd/yajl/blob/refs/tags/2.1.0/CMakeLists.txt#L15-L16

CMake Deprecation Warning at CMakeLists.txt:15 (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.