Run tests requiring kubernetes in CI

[mig4]

PR #13 addresses #5 but only runs the basic tests which don't require Kubernetes. It should be possible to extend the workflow added in #13 to run all tests by using a local temporary instance.

One way of getting one would be to use an action that sets it up in the execution environment like:

• KinD Action
• Minikube Action

Once that's added it should be enough to just change the last step to make test.