fix: eslint config

[alexandre-abrioux]

cherry-picked from #114

I had to fix the eslint config to be able to commit because, as you can see here in the CI the command yarn lint is broken.

The issue comes from the fact that prettier/@typescript-eslint is still used in the project while it has been deprecated (see here).

However, I could not make it work by just modifying the .eslintrc.json, I think it is due to this issue: jaredpalmer/tsdx#498 (comment). tsdx doesn't seem to take into account the extends part of the .eslintrc.json config file. I had to migrate the config to the package.json file. It works for me now!

as suggested by @sakulstra in #114 (comment)

would you mind reopening a pr, cherry picking the lint changes?

[sakulstra]

thx for taking the time @alexandre-abrioux!