scripts/build/build.js/preparePackage
async function preparePackage() {
  const pkg = await util.readJson("package.json");
  pkg.bin = "./bin-prettier.js";
  delete pkg.dependencies;
  delete pkg.devDependencies;
  pkg.scripts = {
    prepublishOnly:
      "node -e \"assert.equal(require('.').version, require('..').version)\"",
  };
  pkg.files = ["*.js"];
  await util.writeJson("dist/package.json", pkg);

  await util.copyFile("./README.md", "./dist/README.md");
  await util.copyFile("./LICENSE", "./dist/LICENSE");
}