Main Features

Remove TraviCi as a Continuous Integration System. The open-source support is going to end at the end of May 2021.
Add GitHub Action as Continuous Integration System.
No intermediate releases from 5.0.6 (i.e., no 5.0.7 and 5.0.8) to the latest (i.e., 5.0.9). The trace of the changes is reported in the CHANGELOGs.

Closed issues/pull requests

Octomap generation (#49)
problem with crazyflie2 hovering example (#50)
hovering example incorrect (#51)
Fixed Typos in README.md (#53)
How to develop on CrazyS such that the code is 1-to-1 with hardware code? (#53)
Can I send the information of velocity to the Crazyflie 2.0 in this project? (#54)
Flight interface (#55)
Parameters in crazyflie2.xacro (#56)
Not leading world file from RotorS package (#57)
problem installing CrazyS in Ubuntu 18.04 using catkin_make (#58)
changing roll pitch and yaw of the drone (#59)
ratio between motor speed and thrust (#60)
ANGULAR_MOTOR_COEFFICIENT inconsistency with the publication (#61)
hovering example with enable_state_estimator=true (#63)
My Simple Questions (#64)
Setting waypoints (#67)
Need help for identifying files for spawning drone at an elevated platform and flight pathing (#68)
crazyflie2_swarm_hovering_example.launch runs but does not hover and can not be controlled. (#69)
the problem of crazyflie2 's config parmas (#70)
the plugins problem (#72)

Giuseppe Silano