[New] no-unused-modules: add eslint v8 support

[coderaiser]

Add support of ESLint v8, the /lib entry point has removed, and

const { FileEnumerator } = require("eslint/lib/cli-engine/file-enumerator");

should be changed to

const { FileEnumerator } = require("eslint/use-at-your-own-risk");

Here is how it looks like in v8 right now

Related to typescript-eslint/typescript-eslint#3735 and typescript-eslint/typescript-eslint#3737 (comment)

[ljharb]

I believe this is a duplicate of #2191. Separately, we won't be supporting eslint 8 officially until it's out of prerelease.

However, this seems like it might be useful to pull in early.

[coderaiser]

Let's use try-catch it is very popular, make codebase flat and similar concept with tuples has Go, a lot people interested in such version, and it can became standard in the future.

Nesting you suggest me to add is horrible and not maintainable.

[SimenB]

Any chance of a release of this? While it might still give peer dep warnings etc until "proper" v8 support lands, I believe this should unblock modules using this plugin in their own migration work without resorting to patching the module 🙂

[ljharb]

I'll try to make a pass through the open PRs and issues this weekend and see if I can cut a release.

[SimenB]

v8 is released, a release of this PR would be awesome 🙂

https://github.com/eslint/eslint/releases/tag/v8.0.0

[ljharb]

Yep, planning on it very soon.