This commit updates cmake_minimum_required version range to 3.0..3.20 to fix build warnings when building on newer Ubuntu releases (e.g. Ubuntu-20.04).
@edowson
Thank you for your contributions!
I'll revise the minimum to 3.0.2 to sync with other TurtleBot3 packages.
Please let me know if this causes problem in your case.
This commit updates cmake_minimum_required version range to 3.0..3.20 to fix build warnings when building on newer Ubuntu releases (e.g. Ubuntu-20.04).