chore: add macOS CI #203

Job	Run time
build (x86-64-linux-gnu, amd64, v1, gcc, linux_x86_64)	1m 19s
build (arm-rpi-linux-gnueabihf, arm, 6, arm-rpi-linux-gnueabihf-gcc, linux_armv6_rpi)	1m 34s
build (aarch64-linux-gnu, arm64, aarch64-linux-gnu-gcc, linux_arm64)	1m 41s
build (arm-linux-gnueabihf, arm, 6, arm-linux-gnueabihf-gcc, linux_armv6)	1m 36s
publish	0s
	6m 10s

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