Update dependency pkg-dir to v8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pkg-dir	^5.0.0 -> ^8.0.0

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Release Notes

sindresorhus/pkg-dir (pkg-dir)

### [`v8.0.0`](https://togithub.com/sindresorhus/pkg-dir/releases/tag/v8.0.0) [Compare Source](https://togithub.com/sindresorhus/pkg-dir/compare/v7.0.0...v8.0.0) ##### Breaking - Require Node.js 18 [`9337d45`](https://togithub.com/sindresorhus/pkg-dir/commit/9337d45) ### [`v7.0.0`](https://togithub.com/sindresorhus/pkg-dir/releases/tag/v7.0.0) [Compare Source](https://togithub.com/sindresorhus/pkg-dir/compare/v6.0.1...v7.0.0) ##### Breaking - Require Node.js 14 [`b05b835`](https://togithub.com/sindresorhus/pkg-dir/commit/b05b835) - Fix TypeScript return type [`dea1a16`](https://togithub.com/sindresorhus/pkg-dir/commit/dea1a16) ### [`v6.0.1`](https://togithub.com/sindresorhus/pkg-dir/releases/tag/v6.0.1) [Compare Source](https://togithub.com/sindresorhus/pkg-dir/compare/v6.0.0...v6.0.1) - Fix regression in v6 ([#​15](https://togithub.com/sindresorhus/pkg-dir/issues/15)) [`6570506`](https://togithub.com/sindresorhus/pkg-dir/commit/6570506) ### [`v6.0.0`](https://togithub.com/sindresorhus/pkg-dir/releases/tag/v6.0.0) [Compare Source](https://togithub.com/sindresorhus/pkg-dir/compare/v5.0.0...v6.0.0) ##### Breaking - Require Node.js 12.20 ([#​14](https://togithub.com/sindresorhus/pkg-dir/issues/14)) [`198c9fe`](https://togithub.com/sindresorhus/pkg-dir/commit/198c9fe) [`aeafb93`](https://togithub.com/sindresorhus/pkg-dir/commit/aeafb93) - This package is now pure ESM. Please [read this](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c). - [Changed from a default export to named exports and the export names changed too.](https://togithub.com/sindresorhus/pkg-dir/compare/sindresorhus:db14a38...sindresorhus:a1006db#diff-5a831ea67cf5cf8703b0de46901ab25bd191f56b320053be9332d9a3b0d01d15L26-R29) - The `cwd` argument is now part of an options-object. ```diff -const pkgDir = require('pkg-dir'); +import {packageDirectory} from 'pkg-dir'; -await pkgDir('/Users/unicorn/foo'); +await packageDirectory({cwd: '/Users/unicorn/foo'}); ```

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