set older macos deployment target + upload macos artifacts to GH actions #155

Job	Run time
(MacOS x86_64) Build curl-impersonate and run the tests	7m 53s
(MacOS x86_64) Build curl-impersonate and run the tests	11m 58s
(x86_64-linux-gnu) Build curl-impersonate and run the tests	9m 18s
(x86_64-linux-gnu) Build curl-impersonate and run the tests	9m 18s
(MacOS arm64) Build curl-impersonate and run the tests	4m 53s
(MacOS arm64) Build curl-impersonate and run the tests	4m 53s
(x86_64-linux-musl) Build curl-impersonate and run the tests	6m 44s
(x86_64-linux-musl) Build curl-impersonate and run the tests	6m 44s
(i386-linux-gnu) Build curl-impersonate and run the tests	3m 43s
(i386-linux-gnu) Build curl-impersonate and run the tests	3m 43s
(aarch64-linux-gnu) Build curl-impersonate and run the tests	4m 25s
(aarch64-linux-gnu) Build curl-impersonate and run the tests	4m 25s
(aarch64-linux-musl) Build curl-impersonate and run the tests	7m 35s
(aarch64-linux-musl) Build curl-impersonate and run the tests	7m 35s
(arm-linux-gnueabihf) Build curl-impersonate and run the tests	4m 32s
(arm-linux-gnueabihf) Build curl-impersonate and run the tests	4m 32s
	1h 42m 11s

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