build: 📦 update dependency mock-fs to v5.4.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mock-fs	5.4.0 -> 5.4.1

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Release Notes

tschaub/mock-fs (mock-fs)

### [`v5.4.1`](https://redirect.github.com/tschaub/mock-fs/blob/HEAD/changelog.md#541) [Compare Source](https://redirect.github.com/tschaub/mock-fs/compare/v5.4.0...v5.4.1) - Avoid errors in `fs.existsSync` (see \[[#​401](https://redirect.github.com/tschaub/mock-fs/issues/401)]\[[#​401](https://redirect.github.com/tschaub/mock-fs/issues/401)])

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Configuration

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