cmake: update ucm minimum cmake version to 3.5

Thanks to Daeho Ro for the suggestion. Closes #376

Author: Grok Compression

cmake/ucm.cmake

@@ -10,7 +10,7 @@
 # The documentation can be found at the library's page:
 # https://github.com/onqtam/ucm
 
-cmake_minimum_required(VERSION 2.8.12)
+cmake_minimum_required(VERSION 3.5)
 
 include(CMakeParseArguments)