Prepare for next release

Signed-off-by: Maurício Meneghini Fauth <mauricio@fauth.dev>

Author: MauricioFauth

CHANGELOG.md

@@ -3,6 +3,8 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [Unreleased]
+
 ## [3.0.2] - 2023-09-11
 ### Added
 - Support for PHP 8.3
@@ -116,6 +118,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Added
 - Initial release based on bfShapeFiles
 
+[Unreleased]: https://github.com/phpmyadmin/shapefile/compare/3.0.2...HEAD
 [3.0.2]: https://github.com/phpmyadmin/shapefile/compare/3.0.1...3.0.2
 [3.0.1]: https://github.com/phpmyadmin/shapefile/compare/3.0.0...3.0.1
 [3.0.0]: https://github.com/phpmyadmin/shapefile/compare/2.1...3.0.0