Support for ESLint 9 and flat configs

[VanTanev]

Hey there,

It would be great if this plugin came with support for ESLint 9. Right now, after spending a good half hour on it, I was not able to get it to work. Tried using Compat and that failed too. It seems unable to detect type information.

[nikitaGetman]

+1

[haykkh]

I got it working by passing the plugin through fixupPluginRules first

// eslint.config.js
const { defineConfig } = require('eslint/config')
const { fixupPluginRules } = require('@eslint/compat')
const neverthrow = require('eslint-plugin-neverthrow')

module.exports = defineConfig([
  {
    plugins: {
      neverthrow: fixupPluginRules(neverthrow)
    }
  }
])

[joaorr3]

+1

[theonekeyg]

I hit this incompatibility with ESLint 9 as well.

@mdbetancourt I'd be glad to fix this stuff, if releases are still planned. Do you still accept PRs for this repo?