[BUG] Regression on install algorithm since 7.20.2

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

Given the following package.json :

{
    "devDependencies": {
        "@hug/eslint-config": "^3.1.2",
        "typescript": "~4.3.5"
    }
}

Running npm install produces:

# With npm 7.20.2
node_modules
├── @angular-eslint
│   └── builder
├── @hug
│   └── eslint-config
├── eslint-plugin-rxjs
├── eslint-plugin-rxjs-angular
└── ...

# With npm >= 7.20.3
node_modules
├── @hug
│   └── eslint-config
│       └── node_modules
│           ├── @angular-eslint
│           │   └── builder
│           ├── eslint-plugin-rxjs
│           ├── eslint-plugin-rxjs-angular
│           └── ...
└── ...

As explained in the documentation, the packages @angular-eslint, eslint-plugin-rxjs, eslint-plugin-rxjs-angular should be installed at the top-level, because they are only required by @hug/eslint-config and nowhere else.

This was still the case with npm@7.20.2 but after that version, packages are now installed privately for @hug/eslint-config without even being installed on the top-level.

This is causing me an issue as my angular project is expecting to find @angular-eslint/builder relatively from the root node_modules folder of my project.

Expected Behavior

I expect the install algorithm to work as described in the documentation and as it was working before.

Environment

• OS: macOS Catalina (version 10.15.6)
• Node: 14.17.5
• npm: 7.22.0

Start with the npm install algorithm documentation and reproduce the package.json example using npm 7.20.2 and 7.22.0. Trace the install entry point responsible for dependency placement, then verify that @angular-eslint, eslint-plugin-rxjs, and eslint-plugin-rxjs-angular are installed at the project-level node_modules as expected.