Updating the Xcode 11.4 image with a very minor change

We have updated the Xcode 11.4.0 image to include a package that will allow us to manage the macOS environments more optimally on the infrastructure side.

The versions of all other pre-installed software haven’t changed, so you shouldn’t see anything different in your jobs using this image. However, if you do notice anything unusual on the Xcode 11.4 image, please let us know in this post.