changelog example added

CHANGELOG.md

@@ -4,15 +4,40 @@ 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/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+<!-- EXAMPLE
+
+## [2.0.0-alpha.0]
 
-## [1.0.0]
 ### Added
 
+- I've added feature XY (#1000)
+
 ### Changed
 
+- I've cleaned up XY (#1000)
+
+### Deprecated
+
+- I've deprecated XY (#1000)
+
 ### Removed
 
+- I've removed XY (#1000)
+
+### Fixed
+
+- I've fixed XY (#1000)
+
+### Security
+
+- I've improved the security in XY (#1000)
+
+-->
+
+## [Unreleased]
+
+## [1.0.0]
+
 
 [Unreleased]: https://github.com/ethereum/web3.js/compare/v1.0.0-beta.37...COMMIT_HASH