Make peerDependencies release type match dependant package or configurable #827

Affected Packages

pkg:@changesets/assemble-release-plan

Problem

We have this mono repo https://github.com/cmpsr/composer when some packages have peerDependencies to other internal packages, for instance @cmpsr/blocks depends on @cmpsr/components and @cmpsr/nextjs-contentful-renderer depends on both @cmpsr/components and @cmpsr/blocks. We have configured the repo so that we update the packages with peerDependencies after each update of the dependency. The issue we have is that right now the changesets generates a major release for packages with peerDependencies -even when the changelog reflects a patch- and we do not want to do a major just because a dependencies has been patched. An example pull request in here where a minor release of @cmpsr/components produce a major release of both blocks and nextjs-contentful-renderer packages.

What have we tried

As a workaround we added this to our .changesets/config.json:

  "___experimentalUnsafeOptions_WILL_CHANGE_IN_PATCH": {
    "onlyUpdatePeerDependentsWhenOutOfRange": true,
    "updateInternalDependents": "always"
  }

With this config when we update a package the packages with peerDependencies to it are producing a patch release but the changelog for the release is empty:

# @cmpsr/blocks

## 2.0.1
                          <----- Missing changelog in here
## 2.0.0

See the full diff in here

Proposed solution

Ideal scenario

Do the same type of release for the package with peerDependencies as the dependency release type. I.e.:

• if we do a patch release for @cmpsr/components then do a patch release for @cmpsr/blocks and @cmpsr/nextjs-contentful-renderer
• if we do a patch release for @cmpsr/components and a minor release for @cmpsr/blocks then do a minor release for @cmpsr/nextjs-contentful-renderer
• if we do a major release for @cmpsr/components then do a major for all dependant packages

Good first approach

Make the release type for peerDependencies configurable via config.json file, something like:

  "updatePeerDependentsAs": "patch" | "minor" | "major"