jest-environment-node peer dependency

Should we add the `jest-environment-node` dev dependency along with `jest-mongodb`?
It is written nowhere in the doc, but yarn complains about that:
```
warning " > @shelf/jest-mongodb@4.1.7" has unmet peer dependency "jest-environment-node@27.x.x || 28.x || 29.x".
```
This peer dependency was added in the commit c99c17d, so it should be useful for the yarn Plug'n'Play mode.