Add support for visionOS (#217) #930

Job	Run time
wine	1m 35s
msrv (ubuntu-latest)	1m 48s
msrv (windows-latest)	1m 56s
clippy	31s
cross (ubuntu-latest, nightly)	2m 17s
fmt	6s
cross (ubuntu-latest, stable)	1m 19s
security_audit	8s
test (ubuntu-latest, nightly)	1m 32s
cross (macos-latest, nightly)	1m 5s
test (ubuntu-latest, beta)	1m 39s
cross (macos-latest, stable)	1m 10s
test (ubuntu-latest, stable)	1m 44s
test (windows-latest, nightly)	1m 46s
test (windows-latest, beta)	2m 11s
test (windows-latest, stable)	2m 6s
test (macos-latest, nightly)	1m 11s
test (macos-latest, beta)	1m 5s
test (macos-latest, stable)	1m 2s
test (windows-latest, nightly-x86_64-pc-windows-gnu)	2m 24s
test (windows-latest, nightly-i686-pc-windows-msvc)	2m 6s
test (windows-latest, nightly-i686-pc-windows-gnu)	2m 9s
	32m 50s

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