Add support for Linux-arm64

[mariocao]

Hi, it would be great if this crate could support Linux-arm64.

If I'm not mistaken, it would only require 2 things:

1. Compile and upload the corresponding sandbox tarball into S3 (e.g. https://s3-us-west-1.amazonaws.com/build.nearprotocol.com/nearcore/Linux-arm64/<version>/near-sandbox.tar.gz).

2. Add the new supported platform in the platform() function in lib.rs.

Thanks in advance!

Note: This issue can also be covered by #7

[frol]

@mariocao Did you mean arm64?

[mariocao]

Yes sorry, my bad. (I edited the issue description)

[frol]

Given that near-sandbox relies on binary artifacts from nearcore CI, the majority of work will need to be contributed there. I don’t see it as a high priority at the moment, but contributors are welcome and I’m happy to review and discuss solutions