Build on Linux ARM

[mlarraz]

What are you trying to accomplish?

Support ARM-based Linux architectures (like Graviton). See https://github.com/closeio/ciso8601/issues/123

What approach did you choose and why?

Followed instructions from here: https://cibuildwheel.pypa.io/en/stable/options/#archs https://cibuildwheel.pypa.io/en/stable/faq/#emulation

What should reviewers focus on?

Verify this actually builds correctly

The impact of these changes

Should be no impact on existing builds

Testing

Presumably someone can run this workflow manually