tests

Update runner to macos-13. #222

Job	Run time
pod-lib-lint	3m 36s
spm-build-test	53s
xcode-project-test (-scheme AppAuth-iOS -destination 'platform=iOS Simulator,name=iPhone 11,OS=17...	1s
pod-lib-lint (--use-libraries)	5m 50s
xcode-project-test (-scheme AppAuth-macOS -destination 'platform=macOS,arch=x86_64' -sdk 'macosx1...	1s
pod-lib-lint (--use-static-frameworks)	3m 53s
xcode-project-test (-scheme AppAuth_macOS -destination 'platform=macOS,arch=x86_64' -sdk 'macosx1...	10s
xcode-project-test (-scheme AppAuth-tvOS -destination 'platform=tvOS Simulator,name=Apple TV,OS=1...	1s
xcode-project-test (-scheme AppAuth_tvOS -destination 'platform=tvOS Simulator,name=Apple TV,OS=1...	1s
xcode-project-test (-scheme AppAuthTV -destination 'platform=tvOS Simulator,name=Apple TV,OS=17.1...	1s
	14m 27s

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