CMake: Indicate that v3.5 has been tested for the minimum requirement

Fixes warning:

CMake Deprecation Warning at CMakeLists.txt:13 (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.

Author: evan-charmworks

CMakeLists.txt

@@ -10,7 +10,7 @@
 # - the buildcmake script
 # - files in cmake/
 
-cmake_minimum_required(VERSION 3.4)
+cmake_minimum_required(VERSION 3.4...3.5)
 
 # Print warning
 message("##################################################################")