There are no actual new Debian versions that aren't already listed, but

there were a couple issues with tests:

The test for debian 10 needed to switch to the archive URL instead of

  https://deb.debian.org, since they've moved it off the main server.
Debian testing/unstable has renamed libxmlsec1-openssl to

libxmlsec1-openssl1. This has no version number, so we needed a way to

  match that.

Ran unit tests.
Ran install tests for debian (arm64 for now, amd64 will come later).