[BUG] npm update seems always installing devDependencies

[Antonius-S]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

npm update seems always installing devDependencies regardless of the --omit and NODE_ENV values

Expected Behavior

devDependencies are ignored

Steps To Reproduce

1. package.json:

{
  "name": "test",
  "version": "0.0.0",
  "description": "test",
  "main": "index.js",
  "engines": {
    "node": ">= 10.0.0"
  },
  "devDependencies": {
    "mocha": "*"
  }
}

save in some folder and run command line there
2. npm up --omit=dev
4. See all the mocha stuff installed
5. set NODE_ENV=production && npm up --omit=dev
6. See the same

Environment

• OS: Windows
• Node: v12.22.6
• npm: 7.22.0

[mbStavola]

I was able to reproduce this on v6 and v8 too.