Merge pull request #57 from lucy66hw/Add_version

Add version

Author: lucy66hw

CHANGELOG.md

@@ -5,6 +5,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ## [Unreleased]
 ### Added
 - Preprocessing - Support x-protobuf-name overrides existing property and parameter name ([#306](https://github.com/opensearch-project/opensearch-protobufs/pull/306))
+- Preprocessing - Handling spec added/deprecated versioning.([#309](https://github.com/opensearch-project/opensearch-protobufs/pull/309))
 
 ### Changed