fix macos build by adding -DCMAKE_POLICY_VERSION_MINIMUM=3.5 -Wno-dev #42

Job	Run time
build (ubuntu-latest, branch@master)	2m 38s
build (ubuntu-latest, branch@dev)	2m 32s
build (windows-latest, branch@dev)	8m 16s
build (macOS-latest, branch@master)	4m 27s
build (windows-latest, branch@master)	9m 32s
build (windows-latest, latest)	7m 53s
build (ubuntu-latest, latest)	2m 26s
build (macOS-latest, branch@dev)	4m 47s
build (macOS-latest, latest)	4m 22s
	46m 53s

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