feat: add osx support

[philippeboyd]

Closes #63

This adds support to build the library on OSX.

Also revamps the CI to build on multiple OS and Redis versions at the same time.

[moticless]

Hi @philippeboyd,
Thanks for the contribution! I'll review the PR over the weekend.
One quick thought: do we really need to test against 3 Ubuntu versions?

[philippeboyd]

Hi @moticless, the only reason I build against all "current" Ubuntu versions is because the version of clang varies depending on the distro. But if you think that's overkill, I can surely just test against the latest ubuntu only. Let me know :)

20.04

clang version 10.0.0-4ubuntu1
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

22.04

Ubuntu clang version 14.0.0-1ubuntu1.1
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

24.04

Ubuntu clang version 18.1.3 (1ubuntu1)
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

[moticless]

I think it’s redundant unless we bumped into a specific issue around it. More importantly, it seems GCC is no longer implicitly tested in the 'build' job as it was before.

[moticless]

Hey @philippeboyd,
is everything set with this PR?

[philippeboyd]

Hey @philippeboyd, is everything set with this PR?

Yes, the CI github action looks good and tests everything on Linux and OSX 👍 I think we can go from here!