Unit tests failing

[wleoncio]

Unit tests, local and on GitHub Actions, are either failing (usualy due to a pathfinding problem) or taking forever to finish (because the datasets are large and the tests need adaptations, e.g. smaller bootstrapping runs).

• Pass local tests
• Pass test-coverage.yaml

As a matter of fact, I'm not sure the Binder tests should be part of the package, since they use datasets that are external to it (i.e., they are only used on the notebook). Alternatively, use smaller versions of them.