Overview
This pull request removes CI validation on Ubuntu 18.04 as this distribution is not longer supported. In place of this, Ubuntu 22.04 has been added.
🛠️ **New Features**
* N/A
🍩 **Improvements**
* Support for Python 3.11
* Move to `pyproject.toml` packaging
* Various packaging changes
🐛 **Bug Fixes**
* N/A