Fix CMake warning
CMake Warning (dev) at
/home/kfunk/devel/install/kf5/share/ECM/modules/ECMPackageConfigHelpers.cmake:84
(message):
Your project already requires a version of CMake that includes the find_dependency macro via the CMakeFindDependencyMacro module. You
should
use CMakePackageConfigHelpers instead of ECMPackageConfigHelpers.