chore(deps): update dependency del to v6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
del	5.1.0 -> 6.1.1

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Release Notes

sindresorhus/del

v6.1.1

Compare Source

• Fix ProgressData#deletedCount (#​142) 7b4c881

v6.1.0

Compare Source

• Add onProgress option (#​141) 8742649

v6.0.0

Compare Source

Breaking

• Require Node.js 10 6c99805

Improvements

• Update dependencies 6c99805

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