update cmake_min, see https://bugs.gentoo.org/964467
from upstream https://sourceforge.net/p/rosegarden/git/ci/667697c99ed8808d40d3dea1e1b138c425e729bb
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 # CMake version required. This must be the very first line, because it sets
 # default policies affecting everything else.
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.10)
 
 # Project name
 project(rosegarden)