Update CMake version.
-cmake_minimum_required(VERSION 2.6)
-cmake_policy(SET CMP0001 NEW) # don't use MAKE_BACKWARDS_COMPATIBILITY but policies instead
-# CMP0042 is an apple specific option
-if (${APPLE})
- cmake_policy(SET CMP0042 NEW) # use MACOSX_RPATH
-endif ()
+cmake_minimum_required(VERSION 3.7)
project(chipmunk)
