evaluate options that remove dependency to GWT SDK bundle

nick, I thought about possibilities to remove the dependency to the gwt sdk bundle since our integration plugin gets uninstallable as soon as google releases a new version. We currently have no choice but to track their updates and release a new version.

The basic problem is that google had the great idea to include the plugin version into the plugin name and that they remove old version from their update site.

I currently don't see any viable solution (optional dependencies dont help for new versions; I cannot depend on packages instead of the bundle since their bundle does not export any package).
Do you see any option that would allow us to trigger the installation of the gwt-sdk bundle when someone installs our integration plugin?