As seen in #507 and #569, there is no guarantee for us that minor dependency updates are actually minor updates for the dependent application itself. The Chart version might be minor - and therefore automatically merged when build is green - but the used Docker image inside the Chart could still be a major version change. To effectively prevent such automerge when the application major version changes, there is now a test file that has the currently used major versions hard-coded. In case of an actual major bump, this file has to be adjusted. Looking at `redis-cluster`, there might be several major Chart versions with the same major application version. This PR is related to #409 but does not fully resolve it. Reviewed-on: gitea/helm-chart#571 Reviewed-by: pat-s <pat-s@noreply.gitea.com>