v0.2.1 changelog

Author: nfriedly

changelog.md

@@ -6,7 +6,16 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.2.0](https://github.com/express-rate-limit/cluster-memory-store/releases/tag/v0.1.1)
+## [0.2.1](https://github.com/express-rate-limit/cluster-memory-store/releases/tag/v0.2.1)
+
+### Fixed
+
+- Fixed an issue preventing multiple instances from being used in a single
+  worker (e.g. to apply different limits to different paths)
+  - Note: the fix requires that each instance in the worker have a unique
+    `prefix`
+
+## [0.2.0](https://github.com/express-rate-limit/cluster-memory-store/releases/tag/v0.2.0)
 
 ### Changed