Enable tests on macOS #16

Job	Run time
build-test-install (ubuntu, gcc, 1)	1m 58s
build-test-install (ubuntu, gcc, 2)	1m 35s
build-test-install (ubuntu, gcc, 3)	2m 1s
build-test-install (ubuntu, gcc, 4)	1m 48s
build-test-install (ubuntu, gcc, 5)	1m 58s
build-test-install (ubuntu, gcc, 6)	1m 27s
build-test-install (ubuntu, clang, 1)	1m 54s
build-test-install (ubuntu, clang, 2)	1m 49s
build-test-install (ubuntu, clang, 3)	2m 6s
build-test-install (ubuntu, clang, 4)	1m 40s
build-test-install (ubuntu, clang, 5)	1m 44s
build-test-install (ubuntu, clang, 6)	1m 29s
build-test-install (macos, gcc, 1)	1m 27s
build-test-install (macos, gcc, 2)	1m 18s
build-test-install (macos, gcc, 3)	1m 31s
build-test-install (macos, gcc, 4)	1m 24s
build-test-install (macos, gcc, 5)	1m 36s
build-test-install (macos, gcc, 6)	1m 28s
build-test-install (macos, clang, 1)	1m 12s
build-test-install (macos, clang, 2)	1m 8s
build-test-install (macos, clang, 3)	1m 15s
build-test-install (macos, clang, 4)	1m 7s
build-test-install (macos, clang, 5)	1m 27s
build-test-install (macos, clang, 6)	1m 23s
	37m 45s

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