build(deps-dev): bump mock-fs from 5.0.0 to 5.1.1

[dependabot[bot]]

Bumps mock-fs from 5.0.0 to 5.1.1.

Changelog

Sourced from mock-fs's changelog.

5.1.1

• Added engines to package.json to clarify that Node >= 12 is required (thanks @​tillig, see #337#337)

5.1.0

• Added support for Node >= 16.3 (thanks @​Rugvip, see #335#335)

Commits

• 313cd08 5.1.1
• 69283aa Log changes
• 31d9017 Merge pull request #337 from tillig/patch-1
• 0b8d63e engines block to specify min requirements
• 8a6ad90 5.1.0
• efd0ee8 Log changes
• 8ce809b Merge pull request #336 from tschaub/updates
• 8baefc8 Dev dependency update
• ca4cfa2 Merge pull request #335 from Rugvip/readfilecontext
• d7237ca readfilecontext: added test for reading file with unknown length
• Additional commits viewable in compare view

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[dependabot[bot]]

Looks like mock-fs is up-to-date now, so this is no longer needed.