Set CMP0167 for CMake 3.30

[dweindl]

https://cmake.org/cmake/help/latest/policy/CMP0167.html

  CMake Error (dev) at CMakeLists.txt:123 (find_package):
    Policy CMP0167 is not set: The FindBoost module is removed.  Run "cmake
    --help-policy CMP0167" for policy details.  Use the cmake_policy command to
    set the policy and suppress this warning.