I had to rush the transition to TypeScript a little bit. Instead of setting the correct types everywhere, I've added a few // @ts-ignore statements:
https://github.com/octokit/plugin-retry.js/search?q=%22%2F%2F+%40ts-ignore%22&unscoped_q=%22%2F%2F+%40ts-ignore%22

I'd love a pull request that remove them and sets the correct types instead. Ask away if you have any questions