Should vcpkg use a FATAL_ERROR clause at the end of the cmake_minimum_required stmt?

[stephengtuggy]

According to https://cmake.org/cmake/help/latest/command/cmake_minimum_required.html :

The FATAL_ERROR option is accepted but ignored by CMake 2.6 and higher. It should be specified so CMake versions 2.4 and lower fail with an error instead of just a warning.

So I would suggest that the cmake_minimum_required line at the top of vcpkg's CMakeLists.txt files, should use FATAL_ERROR. Just in case someone tries to use them with CMake 2.4 or earlier. (Probably a remote chance, but still.)

Like this:

cmake_minimum_required(VERSION 3.9 FATAL_ERROR)

[Osyotr]

Minimum cmake version required to use vcpkg is 3.7.2
#23134