Add wheels for linux/aarch64

[merschformann]

Hey!

Thank you for the awesome project! It's really performant and works nicely.

One thing that I found missing are wheels for linux-aarch64. Nowadays, a good chunk of cloud or even an RPi runs on it. Hence, it would be awesome to have wheels for it.

I've already created a PR (or rather two) that builds the relevant wheels. It may not be complete yet, as I'm missing licenses for some of the tests and some things may be open for discussion. However, let me know what you think.

The PR is #23 (and metab0t/highsbox#5).

Thanks again for the work!
Best,
Marius

[metab0t]

Thanks for your contribution!

I personally do not have ARM device, but it is great to have wheels for linux-aarch64.