Update mavsdk_server to v2.12.3 (mavlink#721)

Merge pull request mavlink#706 from mavlink/pr-update-v2.12.0

Update MAVSDK to v2.12.0

Merge pull request mavlink#705 from mavlink/pr-v2.11.0

Update to MAVSDK v2.11.0

Merge pull request mavlink#699 from mavlink/pr-mavsdk-v2.10.2

Update mavsdk_server to v2.10.2

Merge pull request mavlink#697 from mavlink/pr-mavsdk-v2.10.1

Update to MAVSDK v2.10.1

Merge pull request mavlink#694 from mavlink/pr-mavsdk-v2.10.0

Update to MAVSDK v2.10.0

Merge pull request mavlink#682 from mavlink/pr-v2.9.1

Bump mavsdk_server to v2.9.1

Merge pull request mavlink#680 from mavlink/pr-v2.9.0

Update to mavsdk_server v2.9.0

Merge pull request mavlink#679 from mavlink/pr-v2.8.1

Update to mavsdk_server v2.8.1

Merge pull request mavlink#677 from mavlink/pr-mavsdk-2.8

Update to MAVSDK v2.8.0