Enable build for osx_arm64

[SeaOtocinclus]

Checklist

• [x] Used a personal fork of the feedstock to propose changes
• [x] Bumped the build number (if the version is unchanged)
• [x] Reset the build number to 0 (if the version changed)
• [x] Re-rendered with the latest conda-smithy (Use the phrase code>@<space/conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• [x] Ensured the license file is being packaged.

[conda-forge-webservices[bot]]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe/meta.yaml:

• You should not need to depend on libboost directly. If your package is linking to boost libraries, use libboost-devel in the host environment (which will create the correct dependence at runtime through a run-export), or use libboost-headers if you only need the boost headers.

[SeaOtocinclus]

@conda-forge-admin, please rerender