Please describe the feature you would like to see implemented.

As mentioned in #13 (comment) the process of adding new shopware versions could be automated.

I guess the easiest way would be to:

• setup a scheduled GH-Action that:
  • fetches the latest release from github.com/shopware/platform
  • compares the minor versions against the matrix configuration
  • adds the minor version tag of the found release to the matrix configuration if there is a newer release
  • creates a pull request against master

All that should be possible with GH-Actions running JavaScript code and the GitHub API.
If you'd be willing to accept that (or a different suggested approach), I'd be willing to put time into this and figure that out.