Update np to the latest version 🚀

[greenkeeper]

The devDependency np was updated from 5.2.1 to 6.0.0.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

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Publisher: sindresorhus
License: MIT

Release Notes for v6.0.0

Breaking

• Require Node.js 10 818ff4b

Enhancements

• Show registry URL before publishing (#485) 6bf85df
• Allow publishing if availability check fails (#490) ccdb8a5
• Publish non-private subdirectories when root is private (#483) 607e5c1
• Enforce matching engines on npm install (#481) b14dbc9

Fixes

• Fix checking collaborators when publishing to external registry (#491) 4ad4146

Docs

• Document support for GitHub Packages 91ba1ef

v5.2.1...v6.0.0

Commits

The new version differs by 8 commits.

• a44f05d 6.0.0
• 6bf85df Show registry URL before publishing (#485)
• ccdb8a5 Allow publishing if availability check fails (#490)
• 607e5c1 Publish non-private subdirectories when root is private (#483)
• 4ad4146 Fix checking collaborators when publishing to external registry (#491)
• b14dbc9 Enforce matching engines on npm install (#481)
• 91ba1ef Document support for GitHub Packages
• 818ff4b Require Node.js 10

See the full diff

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Your Greenkeeper bot 🌴

[coveralls]

Pull Request Test Coverage Report for Build 262

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 99.346%

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Totals
Change from base Build 249:	0.0%
Covered Lines:	85
Relevant Lines:	85

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💛 - Coveralls