Xcode 12 Support

[danl3v]

Looks like they are freeing some space for Xcode 12! Fingers crossed for something soon

Xcode 11.3.0 and 11.4.0 Deprecation

Change Summary Over the next few hours we will be removing the Xcode 11.3.0 and 11.4.0 images and redirecting requests for these images to 11.3.1 and 11.4.1 respectively. Why? Doing this will allow us to free up vital space on our fleet to ensure we can get the next round of Xcode images out to customers as soon as possible. How Will This Affect Jobs? 11.3.1 and 11.4.1 are only minor bug fix releases and have minimal minor supporting software changes in the images. This means there should b…