Bump eslint peer dependency version

[jmacedoit]

With recent versions of NPM, npm install will error when having this project as a dev dependency and eslint >= 7 installed (or any peer dependency that doesn't match the installed versions). In order to force the command to complete, adding --legacy-peer-deps is required.

Eslint is already at version 8.17.0 and I believe there is no issue with bumping the peer dependency version.