Node deprecation warning in `yarn seed`: Buffer() is deprecated due to security and usability issues.

This may be coming from `lib/vendor/pdfkit.js` but I am not sure

```
> yarn seed
yarn run v1.21.1
$ knex seed:run --cwd api/src/db
Working directory changed to ~/repos/scoreboard/api/src/db
Using environment: development
(node:10453) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
```

Run `yarn seed` to reproduce the deprecation warning, then inspect `lib/vendor/pdfkit.js` and trace whether it is responsible. Done means identifying the source of the warning and updating the relevant code so the seed command no longer emits it.

Written by the indexing model from the issue text.