bump cmake minimum version to avoid warnings on focal#45

mikaelarguedas wants to merge 1 commit intoros-visualization:melodic-develros-visualization/executive_smach_visualization:melodic-develfrom

mikaelarguedas:fix_noetic_deprecation_warningsmikaelarguedas/executive_smach_visualization:fix_noetic_deprecation_warningsCopy head branch name to clipboard