Update CHANGELOG.md

Author: driesvints

CHANGELOG.md

@@ -1,6 +1,12 @@
 # Release Notes
 
-## [Unreleased](https://github.com/laravel/installer/compare/v2.2.1...master)
+## [Unreleased](https://github.com/laravel/installer/compare/v2.3.0...master)
+
+
+## [v2.3.0 (2019-11-19)](https://github.com/laravel/installer/compare/v2.2.1...v2.3.0)
+
+### Added
+- Add `--auth` flag ([f5ebbff](https://github.com/laravel/installer/commit/f5ebbff32f9ff9c40fdf4c200cb2f396050e3cf3))
 
 
 ## [v2.2.1 (2019-10-29)](https://github.com/laravel/installer/compare/v2.2.0...v2.2.1)