`npm install` warns that 3 dependencies are deprecated

```
npm WARN deprecated inflight@1.0.6: This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.
npm WARN deprecated rimraf@3.0.2: Rimraf versions prior to v4 are no longer supported
npm WARN deprecated glob@7.2.3: Glob versions prior to v9 are no longer supported
```

Of course in the real world projects’ dependencies are not always kept perfectly up-to-date but it might be nice to update these (and switch out `inflight`).