fix(link): change package version when exec link

[BlackHole1]

Fixed: #4341

I will add the relevant unit tests tomorrow.
Before that, I need @zkochan your code review. I am not sure if this is a reasonable change.

[BlackHole1]

I found it difficult to write unit tests for this change.
@zkochan Do you have any ideas?

[zkochan]

Maybe the right way to fix this would be to update this function https://github.com/pnpm/pnpm/blob/main/packages/manifest-utils/src/updateProjectManifestObject.ts

The package spec here would expect a version not a pref. Then updateProjectManifestObject would look for the updated package in all dependencies fields (dev and optional deps as well). It would be also easier to cover that function with unit tests.

But there is an edge case. What to do when a user explicitly runs the command with --save-exact or --save-prefix. In this case, the existing dependency version prefix should be ignored.

[zkochan]

It will be solved by this PR: #6513