to setup dev server
gulp --type dev
To publish a new version you first need to run Gulp in publish mode
gulp --type publish
Increment the package.json version.
Then use yarn to publish the package to the npmjs.com repository. You will be asked for a version number during publishing, if you already updated it then hit [enter]. Otherwise, if you forgot to increment the version number, then enter the new one here (don't forget to commit and push!).
yarn publish
enter your account information for npmjs.com