Welcome to our new stack maintainers: Chad Rockey and Brett Grandbois

We'd like to welcome two new maintainers to the ROS core system. Chad Rockey from NREC will be maintaining imu_drivers and laser_drivers, and Brett Grandbois from CSIRO will be maintaining dynamic_reconfigure. We're excited to see members of the community stepping up to perform this important role. Stack maintainers direct and facilitate the development of the libraries they oversee -- releases like ROS Electric can't happen without their hard work, so thanks to Chad and Brett for stepping up.