Update the CHANGELOG

Author: Vkt0r

CHANGELOG.md

@@ -20,6 +20,7 @@ All notable changes to this project will be documented in this file. Changes not
 
 ## Added
 - A new `CHANGELOG.md` to keep track of changes in the project. ([#385](https://github.com/httpswift/swifter/pull/385)) by [@Vkt0r](https://github.com/Vkt0r)
+- Added [Danger](https://danger.systems/ruby/) and Swiftlint to the project. ([#398](https://github.com/httpswift/swifter/pull/398)) by [@Vkt0r](https://github.com/Vkt0r)
 
 ## Fixed
 - An issue in the `HttpRouter` causing issues to handle routes with overlapping in the tail. ([#379](https://github.com/httpswift/swifter/pull/359), [#382](https://github.com/httpswift/swifter/pull/382)) by [@Vkt0r](https://github.com/Vkt0r)