Support Migrate Tools 6

This is ready for review. I cannot currently create a merge request because the project is missing a dev release, but the code is in https://git.drupalcode.org/issue/migrate_orphans-3378229/-/compare/1.0.x...

I have created a DEV release but I cannot find a way to merge your changes. Can you create a merge request? Then I will merge the change into dev and tag a new release.

I've created a patch from the issue fork. I had to remove the changes from the .info.yml file, because they caused the patch to fail because of the following issue: https://www.drupal.org/project/drupalorg/issues/3066468 📌 Packaging info from .info.yml often creates conflicts when patching (ddo) Active

Thanks! I have also made the merge request.

@kensae FYI the patch posted in #5 is not complete without the change to the .info.yml file. This is needed to avoid a backwards compatibility break with Migrate Tools 5. The complete patch is in the MR: https://git.drupalcode.org/project/migrate_orphans/-/merge_requests/3.diff

If you have trouble with applying the patch on packaged releases then you can use the issue branch directly in composer.json:

    "repositories": [
        {
            "type": "composer",
            "url": "https://packages.drupal.org/8",
            "exclude": ["drupal/migrate_orphans"]
        },
        {
            "type": "package",
            "package": {
                "name": "drupal/migrate_orphans",
                "_readme": "Revert to the stable version once https://www.drupal.org/project/migrate_orphans/issues/3378229 is fixed.",
                "version": "1.1.0",
                "source": {
                    "url": "https://git.drupalcode.org/project/migrate_orphans.git",
                    "type": "git",
                    "reference": "1.0.x"
                },
                "type": "drupal-module"
            }
        },
    ]

@kensae, seg merci he

That patch worked, thx

#9 worked perfectly for me.

As proposed, I have created a new major version supporting Migrate 6. Thanks for all the contribution and testing.