Update CHANGELOG.md

Author: evgeny-krylov

CHANGELOG.md

@@ -5,10 +5,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [1.8.0] - 2019-01-25
 ### Added
 - Core: blocks rollback
 - Core: wallet states
-- Core: node states
+- Core: delegate states
 - Core: light synchronization
 
 ## Changed
@@ -308,6 +310,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - RPC requests: getTimestamp
 
 [Unreleased]: https://github.com/OpenFuturePlatform/open-chain/compare/master...sprint
+[1.8.0]: https://github.com/OpenFuturePlatform/open-chain/compare/v1.7.1...v1.8.0
 [1.7.1]: https://github.com/OpenFuturePlatform/open-chain/compare/v1.7.0...v1.7.1
 [1.7.0]: https://github.com/OpenFuturePlatform/open-chain/compare/v1.6.0...v1.7.0
 [1.6.0]: https://github.com/OpenFuturePlatform/open-chain/compare/v1.5.0...v1.6.0