Changes:

• Move to ROS Noetic.
• Move to Python 3.
• Update Raspberry Pi OS to 2021-05-07.
• aruco.launch: add placement, length and map arguments.
• Web: add link for viewing the error log.
• Use packages.coex.tech as primary packages source.
• LED: add error/ignore parameter to not flash on some errors.
• Wait for FC and camera devices before launching mavros and camera driver.
• genmap.py: add -o argument for output file name.
• blocks: print exception info on error.
• clover.launch: disable rc node by default.
• optical_flow: publish debug image even when calc_flow_gyro failed.
• aruco_detect: add enabled dynamic reconfigure parameter.
• Use forked cv_camera 0.5.1 to recover from camera failures.
• Various changes.

For additional information see the migration guide.