Updated CHANGELOG with 0.6.0 release

Author: magjac

CHANGELOG.md

@@ -5,6 +5,8 @@ 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]
+
+## [0.6.0]
 ### Added
 * Export as URL. Generates a link to the application with the DOT source code as an URL parameter.
 * Specification of the DOT source code through a URL parameter. #69
@@ -125,7 +127,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   * Keyboard shortcuts
   * Mouse interactions
 
-[Unreleased]: https://github.com/magjac/graphviz-visual-editor/compare/v0.5.0...HEAD
+[Unreleased]: https://github.com/magjac/graphviz-visual-editor/compare/v0.6.0...HEAD
+[0.6.0]: https://github.com/magjac/graphviz-visual-editor/compare/v0.5.0...v0.6.0
 [0.5.0]: https://github.com/magjac/graphviz-visual-editor/compare/v0.4.0...v0.5.0
 [0.4.0]: https://github.com/magjac/graphviz-visual-editor/compare/v0.3.1...v0.4.0
 [0.3.1]: https://github.com/magjac/graphviz-visual-editor/compare/v0.3.0...v0.3.1