message: fix(migrations): support --defaults in standalone migration
  Fixes that running the standalone migration with `--defaults` was throwing an error, because all the properties were specified as required. We don't need to set them as required, because they have default values.
  Fixes
  PR Close
diff: },
  "path": {
  "type": "string",
  - "$default": {
  - "$source": "workingDirectory"
  - },
  "description": "Path relative to the project root which should be migrated",
  "x-prompt": "Which path in your project should be migrated?",
  "default": "./"
  }
  - },
  - "required": ["mode", "path"]
  + }
  }
  