Tidy up eslint errors

[ivan-unfolds]

I noticed you have a lot of eslint errors. It's good practice to make sure that any code merged into main doesn't have any errors, including linting ones. Usually this is automated by making a github action that runs on every PR and doesn't let developers merge the PR in unless all tests are passing, eslint is error-free etc.

Also I would recommend using eslint/recommended rather than airbnb-base as it's much less opinionated