Add visionOS support

[stonko1994]

Description

This PR combines the following PRs:

• Adding support for visionOS #31
• Add more visionOS support skumor-foreflight/CwlPreconditionTesting#1

+1

It also updates the podspec files to add visionOS support through CocoaPods.

[stonko1994]

Before this update can be used in Nimble #34 also needs to be merged to fix Carthage support.

[mattgallagher]

Sorry I've been a little slow to get to this. I'll try to look at these in the next day or two.

[mattgallagher]

Works for me 👍. I'll run some double checks then update the versions.

[mattgallagher]

Okay, there's a new 2.2.0 tag so it should work via Swift Package Manager. I can't push an update to Cocoapods at the moment as the latest version of pod refuses to lint it:

[!] Invalid CwlPreconditionTesting.podspec file: undefined method `visionos' for #<Pod::Specification name="CwlPreconditionTesting">.

It looks like the "support" in 1.13 didn't really work and some additional changes will be needed to fully handle the new platform.

[stonko1994]

Can you update without linting or specify the platforms to include?

I added --platforms="ios,tvos,watchos,macos" in Nimble to the pod lint command.