fix: make recommended config a valid flat config

[fasttime]

PR Checklist

• Addresses an existing open issue: fixes 🚀 Feature: Flat config (ESLint 9) support #142
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

This PR updates the recommended config to make it a valid flat config. Currently, the recommended config's plugins field is an array, and thus this config cannot be used in flat mode, where plugins is expected to be an object.

It looks like the readme file already contains instructions for embedding the recommended config in a flat config file, but the recommended config itself hasn't been updated yet.

import expectType from "eslint-plugin-expect-type/configs/recommended";

export default [
	// your other ESLint configurations
	expectType,
];

I noticed this problem while working on eslint/eslint#18869.

[fasttime]

The removed test is a duplicate of another one below:

eslint-plugin-expect-type/src/rules/twoslash.test.ts

Lines 102 to 121 in bf98512

	// Fixer for comment that doesn't continue the twoslash comment
	{
	code: dedent`
	const square = (x: number) => x * x;
	const four = square(2);
	// ^? const four: string
	`,
	errors: [
	{
	column: 7,
	line: 2,
	messageId: "TypesDoNotMatch",
	},
	],
	filename,
	output: dedent`
	const square = (x: number) => x * x;
	const four = square(2);
	// ^? const four: number
	`,

[fasttime]

A lint error was being reported here by perfectionist:

.../eslint-plugin-expect-type/src/utils/types.ts
4:28 error Expected "{ [K in Keys]: NonNullable<BaseType[K]>;
}" to come before "Omit<BaseType, Keys>" perfectionist/sort-intersection-types

[JoshuaKGoldberg]

Wonderful, thanks @fasttime! 🙌

[JoshuaKGoldberg]

CI failures are unrelated and already on main. I'll fix separately.

[JoshuaKGoldberg]

@all-contributors please add @fasttime for code.

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[allcontributors]

@JoshuaKGoldberg

I've put up a pull request to add @fasttime! 🎉

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