The development release of Ubuntu 19.10 (Eoan Ermine) beta is out today. Follow these steps to upgrade to the newest Ubuntu release:
Update Your Current Distribution
1. Update your package list:
sudo apt-get update
2. Install the latest version of your packages:
sudo apt-get dist-upgrade
Upgrade to the Latest Development Release:
3. Run the following command with -d option to obtain the latest development release of Ubuntu:
sudo do-release-upgrade -d
After that, Ubuntu will guide you through the rest of the installation.