Deployer App

Everything is explained on the site. You add their user to your plugin and it helps you deploy your plugins.

I have never tried it but I forked the code of a Github to www.ads-software.com Deployment Script and use it all the time. You can give it a try https://github.com/ahmadawais/github-to-wordpress-deploy-script

This script will pull down your remote GIT and SVN repositories, tag a release using the branch you specify, and commit everything to www.ads-software.com.