message: Use CMake's builtin FindPythonLibs instead of pybind11's
  The FindPythonLibNew module in pybind11 is lacking any validation of
  actually finding the component's it's looking for.
  Fixes
diff: # PYTHONINTERP_FOUND
  # PYTHON_EXECUTABLE
  # PYTHONLIBS_FOUND
  +# PYTHON_INCLUDE_DIRS
  # PYTHON_LIBRARIES
  # PythonModule_${module_NAME}_FOUND
  #
  @@ -33,7 +34,18 @@ foreach(comp IN LISTS PythonFull_FIND_COMPONENTS)
  set(PythonFull_${comp}_FOUND ${PYTHONINTERP_FOUND})
  list(APPEND _req_vars PYTHON_EXECUTABLE)
  elseif(comp STREQUAL Libs)
  - find_package(PythonLibsNew)
  + if(PYTHONINTERP_FOUND AND Python_ADDITIONAL_VERSIONS)
  + set(_Python_ADDITIONAL_VERSIONS "${Python_ADDITIONAL_VERSIONS}")
  + unset(Python_ADDITIONAL_VERSIONS)
  + unset(Python_ADDITIONAL_VERSIONS CACHE)
  + find_package(PythonLibs)
  + set(Python_ADDITIONAL_VERSIONS "${_Python_ADDITIONAL_VERSIONS}"
  + CACHE STRING "Python versions to search for"
  + )
  + unset(_Python_ADDITIONAL_VERSIONS)
  + else()
  + find_package(PythonLibs)
  + endif()
  set(PythonFull_${comp}_FOUND ${PYTHONLIBS_FOUND})
  list(APPEND _req_vars PYTHON_LIBRARIES)
  else()
  