update to v1.20 and add aarch64

[dslarm]

This adds the aarch64 migration to the v1.20 package update.

Checklist

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

[dslarm]

@conda-forge-admin please rerender

[conda-forge-admin]

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.

[dslarm]

@conda-forge/arm-arch - I've combined the upgrade to 1.20 of perl-io-tty and the arm migration - but I can't see evidence of it trying to build on arm.. what am I missing here?
I see it needs the dependency perl-extutils-makemaker (which is in the backlog to be migrated: conda-forge/conda-forge-pinning-feedstock#6919 ) - guess that's why..

[hmaarrfk]

cbrueffer hasn't been active in a few other perl releated PRs. So i'm going to skip the "2 week" period here.

going to merge to unblock. but please open up a followup PR and reference this one to add yourself as a maintainer.

You may use the bot command https://conda-forge.org/docs/maintainer/infrastructure/#conda-forge-admin-please-add-user-username