FindBoost module is removed in CMake 3.30

[gabortim]

I'm using CMake 4.1.2 and upon first config, I presented with this warning:

D:\Projects\libosmium -B D:\Projects\libosmium\cmake-build-debug
-- The CXX compiler identification is GNU 15.2.0
-- The C compiler identification is GNU 15.2.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: D:/mypath/mingw64/bin/c++.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: D:/mypath/mingw64/bin/cc.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
CMake Warning (dev) at CMakeLists.txt:148 (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.

This warning is for project developers.  Use -Wno-dev to suppress it.

-- Could NOT find Boost (missing: Boost_INCLUDE_DIR) (Required is at least version "1.38")
CMake Error at CMakeLists.txt:155 (message):
  PLEASE, specify the directory where the Boost library is installed in
  BOOST_ROOT


-- Configuring incomplete, errors occurred!

[Finished]

According to the CMake docs, the method is removed and the workaround is to include BoostConfig.cmake available with Boost 1.70 and up with find_package(Boost CONFIG).