bump up minspec cmake version to 3.21.0 to ensure folks have COPY_FILE

CMakeLists.txt

@@ -1,6 +1,6 @@
 include("${CMAKE_SOURCE_DIR}/Tools/CMake/torque_macros.cmake")
 include("${CMAKE_SOURCE_DIR}/Tools/CMake/torque_configs.cmake")
-cmake_minimum_required (VERSION 3.10.2)
+cmake_minimum_required (VERSION 3.21.0)
 set (CMAKE_CXX_STANDARD 17)
 
 # Ensure multi-core compilation is enabled for everything