sdformat4 4.1.1 bottle
sdformat4 4.1.1 bottle

Closes #124.

Signed-off-by: Steven Peters <19cdd629ec3b4ea4663c77a4169548f370fdc02f@osrfoundation.org>

j-rivero/homebrew-simulation,osrf/homebrew-simulation,scpeters/homebrew-simulation