sbt/notes/0.13.10/public-null-logger.markdown

[@pdalpra]: http://github.com/pdalpra
[2094]: https://github.com/sbt/sbt/pull/2094

### Fixes with compatibility implications

### Improvements

- Make the 'dummy' `Logger.Null` public [#2094][2094] by [@pdalpra][@pdalpra]

### Bug fixes