fix: slug string conflict with scope

[xsbchen]

What's the problem this PR addresses?

we have two packages: @myscope/user-email and @myscope-user/email, yarn install will show a error: Registry failed to return reference xxx, because yarn caches the results returned by the registry, the keys used in the cache are converted by the slugifyIdent method.In this case, the results after the conversion of these two packages are @myscope-user-email.

How did you fix it?

change the delimiter between scope and name from - to _, refer to https://docs.npmjs.com/cli/v10/using-npm/scope.

Checklist

• I have read the Contributing Guide.

• I have set the packages that need to be released for my changes to be effective.

• I will check that all automated PR checks pass before the PR gets reviewed.

[xsbchen]

hi @arcanis, we are planning to bump yarn to v4 in my team, but we encountered this problem, please review this PR.
Note: It is a break change, I'm not very sure about this.

[arcanis]

It's unclear to me what this is fixing. The slugs are irrelevant to the registry, and your message doesn't explain the commands you run, the registry you use, or the full error message.

[xsbchen]

@arcanis

It's unclear to me what this is fixing. The slugs are irrelevant to the registry, and your message doesn't explain the commands you run, the registry you use, or the full error message.

@arcanis I updated the description:

we have two packages: @myscope/user-email and @myscope-user/email, yarn install will show a error: Registry failed to return reference xxx, because yarn caches the results returned by the registry, the keys used in the cache are converted by the slugifyIdent method.In this case, the results after the conversion of these two packages are @myscope-user-email.

[xsbchen]

@arcanis master, plz help