If a workspace member has a package.json with a postinstall script, it will never be executed.

Steps to reproduce

1. Run mkdir foo
2. Add a foo/package.json with these contents:

{
  "scripts": {
    "postinstall": "echo 'postinstall'"
  },
  "dependencies": {
    "preact": "^10.23.2"
  }
}

3. Add a deno.json at the root with these contents:

{
  "workspace": ["./foo"]
}

4. Run deno install --allow-scripts

The postinstall script is never executed.

Version: Deno 2.0.0-rc.0+ce6b675