message: fix: `npm start` with the modern template
diff: "version": "0.1.0",
  "scripts": {
  <% if (enablePluginUploader) { %>
  + "prestart": "npm run build",
  "start": "node scripts/npm-start.js",
  "upload": "kintone-plugin-uploader dist/plugin.zip --watch --waiting-dialog-ms 3000",
  <% } else { %>
  