Update CHANGELOG.md

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 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]
+## [1.0.0] - 2019-03-11
 ### Added
 - Concurrency safety when sorting the tree.
 - Support for configuring the tree via bitwise flags.
@@ -128,7 +128,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - This package's source code, including examples and tests.
 - Go dep files.
 
-[Unreleased]: https://github.com/gbrlsnchs/radix/compare/v0.4.5...HEAD
+[1.0.0]: https://github.com/gbrlsnchs/radix/compare/v0.4.5...v1.0.0
 [0.4.5]: https://github.com/gbrlsnchs/radix/compare/v0.4.4...v0.4.5
 [0.4.4]: https://github.com/gbrlsnchs/radix/compare/v0.4.3...v0.4.4
 [0.4.3]: https://github.com/gbrlsnchs/radix/compare/v0.4.2...v0.4.3