Add CHANGELOG.md

Fixes #12

Author: REPLicated

CHANGELOG.md

@@ -0,0 +1,21 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
+This project does NOT use semantic versioning.
+
+## [Unreleased]
+
+### Added
+
+- [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
+- The plugin now produces a simple text file reporting the collision detection result.
+  Having such a task output
+  also [fixes incremental builds](https://github.com/REPLicated/classpath-collision-detector/issues/15).
+
+### Changed
+
+- Make JAR of plugin reproducible
+- Upgrade plugin testing dependencies and use Gradle 8.7
+- Use a version catalog and dependency verification for all plugin dependencies.