Update CHANGELOG

CHANGELOG.md

@@ -4,7 +4,28 @@ Categories: Added, Removed, Changed, Fixed, Nonfunctional, Deprecated
 
 ## Unreleased
 
-- Fix recursion in sceptre_user_data becoming infinite
+## 2.2.0 (2019.08.16)
+
+### Added
+
+- Meaningful Jinja Template exception output handling
+
+### Fixed
+
+- Recursion in `sceptre_user_data` becoming infinite
+- AWS `rate_exceeded` error when hitting AWS API too frequently
+- Readme links
+- StackGraph debugging output
+
+### Nonfunctional
+
+- Moved CircleCI Dockerfile to its own repository
+- Add SonarQube analysis
+- Change CircleCI setup to use context over environment variables
+- Removed redundant test code
+- Add badges to README
+- Adjust Coverage fail-level to 92%
+- Update CONTRIBUTING Guide
 
 ## 2.1.5 (2019.06.28)