Support visionOS, watchOS, and tvOS #193

Job	Run time
macos-docs	1m 19s
cargo-publish	0s
ios-check (stable, aarch64-apple-ios)	1m 18s
apple-tier-3-check (aarch64-apple-visionos)	1m 28s
macos-test (stable)	1m 37s
ios-check (stable, x86_64-apple-ios)	1m 33s
apple-tier-3-check (aarch64-apple-visionos-sim)	45s
macos-test (nightly)	1m 25s
ios-check (stable, aarch64-apple-ios-sim)	1m 19s
apple-tier-3-check (aarch64-apple-watchos)	34s
ios-check (nightly, aarch64-apple-ios)	1m 37s
apple-tier-3-check (arm64_32-apple-watchos)	46s
ios-check (nightly, x86_64-apple-ios)	3m 27s
apple-tier-3-check (armv7k-apple-watchos)	47s
ios-check (nightly, aarch64-apple-ios-sim)	1m 26s
apple-tier-3-check (aarch64-apple-watchos-sim)	43s
apple-tier-3-check (x86_64-apple-watchos-sim)	39s
apple-tier-3-check (aarch64-apple-tvos)	1m 18s
apple-tier-3-check (aarch64-apple-tvos-sim)	51s
apple-tier-3-check (x86_64-apple-tvos)	48s
	23m 40s

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