patch to work with noetic

[phithanhdanh]

Hi. I have a fork implementing the solution to have LIO-SAM compile on ROS Noetic from issue #206. Maybe you can create a branch or release specifically for Noetic, that would help users who are compiling on Noetic but don't know how to browse through Issues on GitHub. Thanks!

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.