GORM is no longer auto-bumped

[maxmoehl]

Current behavior

The GORM library we currently use for routing-api github.com/jinzhu/gorm has moved its implementation to github.com/go-gorm/gorm (module path is now gorm.io/gorm) and new versions are not released on the old module anymore. Therefore, the auto-bumper no longer picks up new versions.

Desired behavior

The GORM library is automatically bumped to the latest version.

Affected Version

develop

[ZPascal]

handled by: #536