# Breaking changes in v21

- Re-releasing 20.1.0 as a major.
  - `perfectionist/sort-union-types` switched from `alphabetical` to `natural` sort order.
  - `perfectionist/sort-switch-case` switched from `alphabetical` to `natural` sort order.
  - `perfectionist/sort-classes` bespoke custom grouping defined for TypeScript class compatibility.
- Adds back `sonarjs/code-eval` (removed in v19)