CI not running on FreeBSD

[asomers]

PR #74 added a CI configuration for FreeBSD. However, it isn't running anymore. Is the Cirrus CI app enabled for this repository in Github Marketplace?
https://cirrus-ci.org/guide/quick-start/

[sunfishcode]

I believe Cirrus CI is not enabled for this repository. I'll look into seeing if we can enable it.

[asomers]

@sunfishcode it's not working again. Did you check that Cirrus is enabled?

[sunfishcode]

No, Cirrus is not yet enabled. Unfortunately, it has turned out to be not straightforward to enable in this organization.

I am able to run the CI script in a fork of this repo. Doing this just now turned up some issues with the CI script being out of date. I've now fixed those issues in #355 and can confirm that the CI tests all pass again.