Inline script commands in package.json are ignored

Reopening #257

When a dependency is only used inside parenthesis of another command in package.json scripts, depcheck marks this dependency as unused. e.g.:

  "scripts": {
    "start": "concurrently \"cross-env BROWSER=none yarn browser\" \"wait-on http://localhost:3000 && electron .\""
  },
  "devDependencies": {
    "concurrently": "^3.5.1",
    "cross-env": "^5.1.6",
    "wait-on": "^2.1.0"
  }

Here, cross-env and wait-on are marked as unused.

This problem also happens with husky and jest

[Rauno56]

Using cross-env in scripts is a common usecase depcheck doesn’t catch so the parentheses real or imaginary, do not seem to matter. Somewhat more simple example for a script:

...
  "scripts": {
    "run": "cross-env PORT=8080 node ./server.js"
  },
...

[stale[bot]]

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