Merge remote-tracking branch 'origin/master' into feature/bounded_policy_gradient

Author: reiniscimurs

tests/test_world.yaml

@@ -3,7 +3,7 @@ world:
   width: 10   # the height of the world
   step_time: 1.0
   sample_time: 1.0
-  collision_mode: 'react'
+  collision_mode: 'reactive'
 
 robot:
   - kinematics: {name: 'diff'}