cmake: Bump min policy version

[arno-lunarg]

We are getting this error:

 CMake Error at external/Release/64/jsoncpp/build/install/lib/cmake/jsoncpp/jsoncppConfig.cmake:2 (cmake_policy):
  Compatibility with CMake < 3.5 has been removed from CMake.

  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
  to tell CMake that the project requires at least <min> but has been updated
  to work with policies introduced by <max> or earlier.

  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
Call Stack (most recent call first):
  CMakeLists.txt:32 (find_package)

Is bumping minimum to 3.5 ok?

[spencer-lunarg]

not a CMake guru here, but wanted to add context the issue is we pull this in as a dependency and Github Action runners started used cmake 4.0 from 3.31.6 and that is where this started occuring

[bcsgh]

I'd think the correct thing would be to bump up the max, not the min?

As long as things build under v3.0, there should be no reason to change the min. That should only happen if the config starts using something that isn't added until a later version.

[flichtenheld]

Yes, 1.9.6 should be fine with the addition of the max version. You should verify that you actually 1.9.6.