Dependencies out of date. 353 vulnerabilities

The dependencies seem to be outdated. `npm install` returned this:

```
added 550 packages from 795 contributors and audited 3262 packages in 7.756s
found 353 vulnerabilities (2 low, 9 moderate, 339 high, 3 critical)
  run `npm audit fix` to fix them, or `npm audit` for details
```