sorted-list-0.2.3.0: changelog.md

## 0.2.3.0
* Update metadata.
* Add `traverse`.
* License changed from BSD3 to MIT for consistency.

## 0.2.2.0
* Add `deleteAll`.

## 0.2.1.2
* Use `compare` instead of inequalities in `delete` implementation.
* Add test.

## 0.2.1.1
* Improve `delete` implementation.