test: Increase minimum cmake version so that it works with Qt 6.7

This new cmake version enables CMP0071

Approved IRL by Nico Fella and Volker Krause

tests/ECMQmlModuleTest/CMakeLists.txt

@@ -3,7 +3,7 @@
 #
 # SPDX-License-Identifier: BSD-3-Clause
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.16)
 project(extra-cmake-modules)
 
 set(ECM_MODULE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../modules)