chore: Bump Xcode version in CI (#134) #524

Job	Run time
windows	3m 16s
test (platform=iOS\ Simulator,name=iPhone\ 14\ Pro\ Max, test)	18m 6s
test (platform\=tvOS\ Simulator,name\=Apple\ TV, test)	8m 25s
linux	2m 54s
spm-test	6m 47s
test (platform=watchOS\ Simulator,name=Apple\ Watch\ Series\ 5\ \(40mm\), build)	3m 49s
test (platform=macOS, test)	9m 48s
xcode-test-5_5	1m 19s
cocoapods	8m 58s
docs	1m 6s
	1h 4m 28s

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