Support ESLint 8.x

[MichaelDeBoey]

ESLint v8.0.0 is released 🎉

It would be awesome to have official ESLint 8 support. 👊
I'm happy to help where I can of course 🙂

[snitin315]

PR welcome :)

[jsg2021]

I don't think this project uses any of the removed/deprecated exports. For example, this uses the ESLint export already. As far as I know, it should already be compatible.

[jsg2021]

Yeah, I think the only thing needed is the peerDep to be extended with ^7.0.0 || >=8.0.0-beta.0 <9

[MichaelDeBoey]

@jsg2021 The deprecated CLIEngine is also used

[tipleavalentin]

Any updates?
I get this issue on eslint 8.0.0/8.0.1:
Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './lib/cli-engine/formatters/stylish' is not defined by "exports"

[alexander-akait]

@ricardogobbosouza hello, can you look?

[tipleavalentin]

@ricardogobbosouza hello, can you look?

Hi! I got a reply on the eslint package:
"This is an internal module. As of ESLint v8.0.0, internal modules cannot be accessed."

This config works:
new ESLintPlugin({
failOnError: true,
formatter: 'stylish'
})

[alexander-akait]

Looks like stylish was removed from eslint

[ricardogobbosouza]

I will add support for eslint 8 by the end of the week