docs: update changelog for release

Author: mallardduck

CHANGELOG.md

@@ -5,6 +5,12 @@ 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).
 
+## 1.1.0 - 2021-08-03
+
+### Added
+
+- Ability to look up IPv4 to find its whois server.
+
 ## 1.0.0 - 2021-07-29
 
 ### Added