Test Package on Windows devices

[stefanzweifel]

The test suite of the package is currently only tested on ubuntu-latest on GitHub Actions.

However, as the package is often also used by users on Windows devices, we should extend the test suite so that all tests are also automatically tested on Windows devices.

The current GitHub Actions workflow relies on service containers to install and boot a MySQL instance (see #6 for details regarding PostgreSQL). This feature is not available on windows-latest and macos-latest.

There are Actions available on the GitHub Actions Marketplace to help us out here. Maybe we can use actions-setup-mysql to set up MySQL reliably on all device categories.