Omitting license file from published tarballs

Say we have a package.json file:

{
  "name": "json-stdio",
  "main": "dist/main.js",
  "version": "0.1.111",
  "bugs": {
    "url": "https://github.com/ORESoftware/json-stdio/issues"
  },
  "bin": {
    "stdio": "cli/stdio.js",
    "json_stdio": "cli/stdio.js"
  },
  "keywords": [
    "json",
    "stdout"
  ],
  "license": "MIT",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/ORESoftware/json-stdio.git"
  },
  "scripts": {
    "tsc": "tsc"
  }
}

is there a way to include a url for the license field? something like this instead:

{
 "license":"https://github.com/ORESoftware/json-stdio/blob/dev/license.md"
}

this way we could omit the license file from the published tarballs, pare them down even more.