mrpt_navigation: Cannot release with bloom to ROS melodic

Apparently, melodic is still missing some other deps:

Pre-verifying Debian dependency keys...
Running 'rosdep update'...
Could not resolve rosdep key 'cv_bridge'
Failed to resolve cv_bridge on ubuntu:artful with: Error running generator: Failed to resolve rosdep key 'cv_bridge', aborting.
cv_bridge is depended on by these packages: ['mrpt_bridge']
<== Failed
Could not resolve rosdep key 'cv_bridge'
Failed to resolve cv_bridge on ubuntu:bionic with: Error running generator: Failed to resolve rosdep key 'cv_bridge', aborting.
cv_bridge is depended on by these packages: ['mrpt_bridge']
<== Failed
Could not resolve rosdep key 'marker_msgs'
Failed to resolve marker_msgs on ubuntu:artful with: Error running generator: Failed to resolve rosdep key 'marker_msgs', aborting.
marker_msgs is depended on by these packages: ['mrpt_bridge', 'mrpt_rawlog']
<== Failed
Could not resolve rosdep key 'marker_msgs'
Failed to resolve marker_msgs on ubuntu:bionic with: Error running generator: Failed to resolve rosdep key 'marker_msgs', aborting.
marker_msgs is depended on by these packages: ['mrpt_bridge', 'mrpt_rawlog']
<== Failed
Could not resolve rosdep key 'pcl_conversions'
Failed to resolve pcl_conversions on ubuntu:artful with: Error running generator: Failed to resolve rosdep key 'pcl_conversions', aborting.
pcl_conversions is depended on by these packages: ['mrpt_bridge']
<== Failed
Could not resolve rosdep key 'pcl_conversions'
Failed to resolve pcl_conversions on ubuntu:bionic with: Error running generator: Failed to resolve rosdep key 'pcl_conversions', aborting.
pcl_conversions is depended on by these packages: ['mrpt_bridge']
<== Failed
Could not resolve rosdep key 'pose_cov_ops'
Failed to resolve pose_cov_ops on ubuntu:artful with: Error running generator: Failed to resolve rosdep key 'pose_cov_ops', aborting.
pose_cov_ops is depended on by these packages: ['mrpt_localization']
<== Failed
Could not resolve rosdep key 'pose_cov_ops'
Failed to resolve pose_cov_ops on ubuntu:bionic with: Error running generator: Failed to resolve rosdep key 'pose_cov_ops', aborting.
pose_cov_ops is depended on by these packages: ['mrpt_localization']
<== Failed
Could not resolve rosdep key 'teleop_twist_keyboard'
Failed to resolve teleop_twist_keyboard on ubuntu:artful with: Error running generator: Failed to resolve rosdep key 'teleop_twist_keyboard', aborting.
teleop_twist_keyboard is depended on by these packages: ['mrpt_tutorials']
<== Failed
Could not resolve rosdep key 'teleop_twist_keyboard'
Failed to resolve teleop_twist_keyboard on ubuntu:bionic with: Error running generator: Failed to resolve rosdep key 'teleop_twist_keyboard', aborting.
teleop_twist_keyboard is depended on by these packages: ['mrpt_tutorials']

pose_cov_ops is ours. For the rest, I guess we should wait.