explciitly setting conformance and contraint to account for all scena… #42

Job	Run time
Build framework (macos-release, -sdk macosx -configuration Release)	24m 10s
Build framework (ios-release, -sdk iphoneos -configuration Release)	9m 48s
Build framework (tvos-debug, -sdk appletvos -configuration Debug)	13m 20s
Build framework (watchos-debug, -sdk watchos -configuration Debug)	11m 24s
Run framework tests (asan, -enableAddressSanitizer YES -enableUndefinedBehaviorSanitizer YES)	35m 1s
Run framework tests (tsan, -enableThreadSanitizer YES)	32m 54s
Run framework tests (leaks, ENABLE_LEAK_DETECTION=1)	37m 45s
	2h 44m 22s

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