[BUG] installing a dependency in a package with a peer dependency changes the peerDependencies field

[targos]

Current Behavior:

If you have a package with something in peerDependencies and then install that something in the same package as a devDependency, the peerDependencies field is changed and the dependency is added to package.json, but it inherits the semver string that the peer dependency had.

Expected Behavior:

Installing a dev dependency should do the same change to the package.json, whether that dependency is already in peerDependencies or not.

Steps To Reproduce:

echo '{ "peerDependencies": { "typescript": "*" } }' > package.json
npm i -D typescript
cat package.json

{"peerDependencies":{"typescript":"^4.2.4"},"devDependencies":{"typescript":"*"}}

Environment:

• OS: macOS
• Node: 15.14.0
• npm: 7.10.0

[wraithgar]

Closing this as a duplicate of #2647, as it's the same root cause.