Add CI tests

[AdamRJensen]

Adding continuous integration tests is extremely important! I can help set that up if you'd like.

[khintz]

Agree. This repo has lived most of its life so far on GitLab, where we had CI running. It should, of course, also be set up under GitHub Actions. @elbdmi are you already on it, or should @AdamRJensen make a PR for it?

[elbdmi]

Agree. This repo has lived most of its life so far on GitLab, where we had CI running. It should, of course, also be set up under GitHub Actions. @elbdmi are you already on it, or should @AdamRJensen make a PR for it?

No I am not already on it. I won't have time to take a look at it today. If Adam wants can make a PR for it.