Update dependency conf to v12

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
conf	^10.2.0 -> ^12.0.0

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Release Notes

sindresorhus/conf (conf)

v12.0.0

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Breaking

• Require Node.js 18 aa12658

v11.0.2

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• Fix types for .delete() to allow access by dot notation (#​182) 5b9a6e3

v11.0.1

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• Fix paths in package.json's exports (#​172) 99732a0

v11.0.0

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Breaking

• Require Node.js 14 cea3d68
• This package is now pure ESM. Please read this.
• The projectName option is now required unless you use the cwd option.
  • Previously, the package fetched the package name from the closest package.json, but this is no longer possible with ESM.
  • If you target Node.js 18 or later, it's quite easy to read package.json.
• The projectVersion option is now required if you use the migration option.
• Remove encryption migration 80e1ff0
  • Make sure to upgrade to v10 first if you upgrade from a version earlier than v5.

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