Change log for 1.2.0 Beta.

CHANGELOG.md

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+# Changelog
+All notable changes to this project will be documented in this file.
+
+This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## 1.2.0 Beta (Jan 2023)
+
+### Improvements
+- Reduce default ValueSet $expand results size to 100 for better performance
+- Ability to load extension packages over REST API
+- Parameterise import batch size
+- Add Google App Engine config and warmup handler
+
+### Fixes
+- More robust parsing of syndication feed, to allow for inconsistent package size number formats
+- CVE security fixes for level 7 and above
+- Fix ValueSet $expand when multiple includes
+- Fix $validate error: CodeSystem id format
+- Remove compose section from ValueSet listing
+
+## 1.1.1 Beta (November 2023)
+Beta Release with syndication service integration and ability to load Edition packages via REST API.