Function updatePackageJson

scripts/changes/version.ts:188–199

* Updates package.json version

(packageDirName: string, newVersion: string)

 * Updates package.json version
 */
function updatePackageJson(packageDirName: string, newVersion: string) {
  if (preview) {
    console.log(`  • Would update package.json to ${newVersion}`);
    return;
  }

  let packageJsonPath = getPackageFile(packageDirName, "package.json");
  let packageJson = readJson(packageJsonPath);
  packageJson.version = newVersion;
  writeJson(packageJsonPath, packageJson);
  console.log(`  ✓ Updated package.json to ${newVersion}`);
}

/**
 * Updates CHANGELOG.md with new content