Release 0.2.2

Prometheus rate() time range fix

Author: DifferentialOrange

CHANGELOG.md

@@ -4,7 +4,8 @@ All notable changes to this project will be documented in this file.
 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).
 
-## [Unreleased]
+## [0.2.2] - 2021-01-28
+Grafana revisions: [Prometheus revision 3](https://grafana.com/api/dashboards/13054/revisions/3/download)
 
 ## Changed
 - Make Prometheus rps graphs rate() time range configurable