Old prop-types version references bad node-fetch version

`prop-types 15.5.8` references `node-fetch@^1.0.1`, and yarn audit tells me

```
│ low           │ Denial of Service                                            │
│ Package       │ node-fetch                                                   │
│ Patched in    │ >=2.6.1 <3.0.0-beta.1|| >= 3.0.0-beta.9                      │
```