Eslint: upgrade to version 8.0.0

[mrtnzlml]

See:

• https://eslint.org/blog/2021/10/eslint-v8.0.0-released
• https://eslint.org/docs/user-guide/migrating-to-8.0.0

Known unresolved issues (with low impact )that we decided to accept:

• ESLint 8.x regression: node/process-exit-as-throw no longer works mysticatea/eslint-plugin-node#301

Known issues that need to be fixed first:

• wait for [New] Support for ESLint v8 import-js/eslint-plugin-import#2191 to be released and merged here
• wait for feat: support ESLint 8.x gajus/eslint-plugin-flowtype#496 to be released and merged here
• wait for Support ESLint 8.x testing-library/eslint-plugin-testing-library#462 to be released and merged here
• wait for Support ESLint 8.x mysticatea/eslint-plugin-node#294 to be released and merged here replaced (probably temporarily) with eslint-plugin-n which supports Eslint 8
• wait for feat(eslint-plugin-react-hooks): support ESLint 8.x facebook/react#22248 to be released and merged here
• release minor/patch version of Adeira Eslint Config before merging this breaking change
• switch NEXT_VERSION_ERROR to ERROR (Eslint config: convert all NEXT_VERSION_ERROR to ERROR #3625)

[mrtnzlml]

Hola @Brianzchen 👋 Would you happen to know why are the tests failing because of eslint-plugin-ft-flow on Eslint 8? 🤔 Is eslint-plugin-ft-flow tested against Eslint 8? Does it support this latest Eslint version?

[Brianzchen]

So I raised an issue about this here. I guess I understand what this dodgy code does now. My projects are on eslint v8 but I suppose it never impacted me because I never used this rules.

This is an easy fix let me raise a PR for you shortly

[maicol07]

@mrtnzlml I think this can be merged now that all the plugins have been updated!