Update changelog for in preparation for 1.1.0 release (#50)

CHANGELOG.md

@@ -4,6 +4,12 @@ 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]
+### Added
+- [#49]: Add option to ignore current goroutines, which checks for any additional leaks and allows for incremental adoption of goleak in larger projects.
+
+Thanks to @denis-tingajkin for their contributions to this release.
+
 ## [1.0.0]
 ### Changed
 - Migrate to Go modules.
@@ -15,3 +21,4 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Initial release.
 
 [1.0.0]: https://github.com/uber-go/goleak/compare/v0.10.0...v1.0.0
+[#49]: https://github.com/uber-go/goleak/pull/49