Add changelog entry for v1.1.11 (#64)

This adds entries for CHANGELOG to prepare for v1.1.11 release of goleak.

CHANGELOG.md

@@ -4,7 +4,13 @@ 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]
+## [1.1.11]
+### Fixed
+- Documentation fix on how to test.
+- Update dependency on stretchr/testify to v1.7.0. (#59)
+- Update dependency on golang.org/x/tools to address CVE-2020-14040. (#62)
+
+## [1.1.10]
 ### Added
 - [#49]: Add option to ignore current goroutines, which checks for any additional leaks and allows for incremental adoption of goleak in larger projects.