Update dependency del to v5.1.0 - autoclosed

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
del	devDependencies	minor	5.0.0 -> 5.1.0

By merging this PR, the issue #20 will be automatically resolved and closed:

Severity	CVSS Score	CVE
High	7.5	CVE-2020-28469

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Release Notes

sindresorhus/del

### [`v5.1.0`](https://togithub.com/sindresorhus/del/releases/v5.1.0) [Compare Source](https://togithub.com/sindresorhus/del/compare/v5.0.0...v5.1.0) Enhancements: - Allow non-glob patterns with backslash on Windows (like v4) ([#​100](https://togithub.com/sindresorhus/del/issues/100)) [`01da91f`](https://togithub.com/sindresorhus/del/commit/01da91f) - Make deletion more reliable on Windows by retrying when Windows is being difficult ([#​108](https://togithub.com/sindresorhus/del/issues/108)) [`1299747`](https://togithub.com/sindresorhus/del/commit/1299747) - Sort removed files, so the returned array is always stable ([#​102](https://togithub.com/sindresorhus/del/issues/102)) [`ca05c65`](https://togithub.com/sindresorhus/del/commit/ca05c65) Fixes: - Fix the `cwd` option ([#​96](https://togithub.com/sindresorhus/del/issues/96)) [`ffbf4c4`](https://togithub.com/sindresorhus/del/commit/ffbf4c4) - Prevent race condition on macOS when deleting files ([#​95](https://togithub.com/sindresorhus/del/issues/95)) [`8efdbcd`](https://togithub.com/sindresorhus/del/commit/8efdbcd) *** Shoutout to [@​chrisblossom](https://togithub.com/chrisblossom) for doing most of the work on this release 🙌

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