feat: add yarn v2 (berry) support

[mathe42]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

This PR adds yarn v2 support. For this the json5 dependencie has to be added directly in package.json

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes (if not applicable, please state why)

[mathe42]

As json5 is required by some code with yarn v2 @nuxt/content has to declare it in the dependencies.

This is a single line change to the package.json

Just wondering why is yarn.lock not in git and not in .gitignore? One of this should be true!?

[nozomuikuta]

@mathe42

Would you share some references so that we can know better why json5 package is needed?
Once it's verified, I think I can merge this PR.

By the way, yarn.lock was generated again after you had created this PR.
So it would be safer if you merge the main branch to your branch and update yarn.lock file as needed.

[mathe42]

JSON5 is imported here: https://github.com/nuxt/content/blob/main/packages/content/lib/database.js#L5 so for yarn v2 (berry) it would be optimal to add it to dependencies. (You can have multiple versions of a package with yarn v2 so yarn doesn't know wich to use. (There are workarounds but I think adding the dependencie would be a good idea).

[nozomuikuta]

@mathe42

Thank you for quick response!

I see, and yeah, JSON5 package definitely should be added as a dependency if it's directly used by the package, regardless of Yarn's requirement. 🙌