Add cmake_minimum_required() before first project() call on line 1

[Neumann-A]

Reason: See CMake doc: https://cmake.org/cmake/help/v3.17/command/cmake_minimum_required.html#command:cmake_minimum_required

Failure: (Build failure with CMake 3.17) https://github.com/microsoft/vcpkg/issues/10714 Solution: https://github.com/microsoft/vcpkg/pull/10715#discussion_r404210504