#14 Fedora patch: update cmake minimum version requirement

[Nils Philippsen]

Hi,

CMake makes this complaint:

CMake Deprecation Warning at CMakeLists.txt:2 (cmake_minimum_required):
  Compatibility with CMake < 3.5 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.

I’ll use the attached patch to silence this in the Fedora package.