v0.49.0

Features:

• added offboard global pos global altitude and altitude terrain (#1626).
• Offboard pos global (#1620).

Bugfixes:

• mission: fail if mission item is unsupported (#1634).
• Fix battery voltage (#1621).
• Fix failure enums (do not cast enum values directly) (#1619).
• mission: fix jsoncpp cmake (#1613).

Enhancements:

• takeoff_and_land: fix plugin(i)s typo (#1635).
• mission: remove TRIGGER_CONTROL (#1632).
• core: only request autopilot version if autopilot (#1631).
• Use modern numeric limits (#1623).
• Do not cancel SITL jobs in CI, even if another one failed (#1622).
• core: add SystemImpl::make_command_ack_message() method (#1617).

Contributors:

@dlech, @JonasVautherin, @julianoes, @MaEtUgR, @romain-chiap, @slaghuis