CMake warning messages

FYI, compiling the SDK with a recent version of CMake raises many warnings like so:

CMake Deprecation Warning at /Users/Shared/Steinberg/VST_SDK.3.7.12/base/CMakeLists.txt:2 (cmake_minimum_required):
  Compatibility with CMake < 3.10 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.

Given the fact that the file CMakeLists.txt under GitHub - steinbergmedia/vst3sdk: VST 3 Plug-In SDK requires CMake 3.19.0, all the submodules should be updated to this value to remove these warnings (right now they requires CMake 3.5)

Thanks

Thanks, we will investigate this for next update.