Fix eslint config

[peterwilsoncc]

Describe the bug

Running eslint on this repo fails with the message that the WordPress eslint config is not installed.

While working on #351 I wasn't able to get it working so it will need a little further investigation as to the cause.

Steps to Reproduce

1. Run npm ci
2. Run npx wp-scripts lint-js
3. Observe failure.

Screenshots, screen recording, code snippet

No response

Environment information

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WordPress information

No response

Code of Conduct

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