gazebo11 11.11.0 (#1925)
gazebo11 11.11.0 (#1925)

* gazebo11: depend on ffmpeg
  We don't need ffmpeg@4 anymore.
* update  bottle.

Co-authored-by: Steve Peters <19cdd629ec3b4ea4663c77a4169548f370fdc02f@openrobotics.org>
osrf/homebrew-simulation