Update dependency update-notifier to v6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
update-notifier	^5.0.0 -> ^6.0.0
@types/update-notifier (source)	^5.0.0 -> ^6.0.0

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Release Notes

yeoman/update-notifier (update-notifier)

v6.0.2

Compare Source

• Fix license d152f85

v6.0.1

Compare Source

• Update dependencies (#​222) 3f7c9f3

v6.0.0

Compare Source

Breaking

• Require Node.js 14 9183541
• This package is now pure ESM. Please read this.

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