Add vitest globals

[yongholeeme]

Hello @sindresorhus! I'm opening a PR to add vitest globals.

A similar PR was previously opened in #210, but it was closed due to the package's management policy at that time (as discussed in #82). However, since ESLint no longer bundles globals and new environments are now being added to the globals package, I believe it's appropriate to open this request.

I've added these by referencing the official Vitest globals definition file: https://github.com/vitest-dev/vitest/blob/main/packages/vitest/globals.d.ts.

[fisker]

As I tested, vitest package can't be imported, it seems there is no way to get those from vitest package, but vitest/globals contains types, is it possible to assert they are equal here https://github.com/sindresorhus/globals/blob/main/index.test-d.ts?

[yongholeeme]

As I tested, vitest package can't be imported, it seems there is no way to get those from vitest package, but vitest/globals contains types, is it possible to assert they are equal here https://github.com/sindresorhus/globals/blob/main/index.test-d.ts?

@fisker, as you mentioned, vitest/globals contains types in globals.d.ts. However, since these are declared as global types, I think it's difficult to assert their equality.

[yongholeeme]

@fisker, I've updated the way of generating vitest globals by using @vitest/eslint-plugin (see https://github.com/vitest-dev/eslint-plugin-vitest/blob/main/src/index.ts#L269-L285). However, it's not identical to vitest/globals. As this is the official package, I think this approach would be better for maintaining globals, and I'll create an issue to request alignment between them. I've synchronized with PR vitest-dev/eslint-plugin-vitest#599 and updated it. (dd5cdcb)