Update CHANGELOG to release v0.18.0

CHANGELOG.md

@@ -7,6 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.18.0] - 2020-10-26
+
+### Removed
+
+- Feature #51 Remove CodeIgniter System files.
+- Fix #50 Remove exact same method `Category_model::get_category_children()`.
+- Feature #49 Remove hardcoded info.
+- Feature #47 Remove old javascript libraries.
+
 ## [0.17.0] - 2020-07-27
 
 ### Added
@@ -434,7 +443,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - `/licence.txt`
   - `/README.md`
 
-[unreleased]: https://github.com/panigrc/SimpleCiShop/compare/v0.17.0...HEAD
+[unreleased]: https://github.com/panigrc/SimpleCiShop/compare/v0.18.0...HEAD
+[0.18.0]: https://github.com/panigrc/SimpleCiShop/compare/v0.17.0...v0.18.0
 [0.17.0]: https://github.com/panigrc/SimpleCiShop/compare/v0.16.0...v0.17.0
 [0.16.0]: https://github.com/panigrc/SimpleCiShop/compare/v0.15.0...v0.16.0
 [0.15.0]: https://github.com/panigrc/SimpleCiShop/compare/v0.14.0...v0.15.0