Fawkes 1.3.0

• Switch to the more modern mongocxx-v3 as C++ driver for mongodb with support for MongoDB 4
• Add support for modern Intel RealSense cameras (D400 series and SR300) with librealsense2
• Add the skiller-simulator, a plugin that simulates skill execution for simulation tests without a Gazebo environment
• Fix a number of CLIPS Executive bugs in locking and worldmodel synchronization
• Switch to Fedora 30 for CI builds