Updated changelog and readme

Author: rg911

CHANGELOG.md

@@ -161,6 +161,7 @@ The changelog format is based on [Keep a Changelog](https://keepachangelog.com/e
 **Milestone**: Alpaca
 
 - Initial code release.
+[0.13.0]: https://github.com/nemtech/nem2-sdk-typescript-javascript/compare/v0.13.0...v0.13.1
 [0.13.0]: https://github.com/nemtech/nem2-sdk-typescript-javascript/compare/v0.12.4...v0.13.0
 [0.12.4]: https://github.com/nemtech/nem2-sdk-typescript-javascript/compare/v0.12.3...v0.12.4
 [0.12.3]: https://github.com/nemtech/nem2-sdk-typescript-javascript/compare/v0.12.2...v0.12.3

README.md

@@ -14,7 +14,7 @@ with the NEM2 (a.k.a Catapult)
 
 Due to a network upgrade with [catapult-server@elephant](https://github.com/nemtech/catapult-server/releases/tag/v0.5.0.1) version, **it is recommended to use this package's 0.13.1 version and upwards to use this package with Elephant versioned networks**.
 
-The upgrade to this package's [version v0.13.0](https://github.com/nemtech/nem2-sdk-typescript-javascript/releases/tag/v0.13.0) is mandatory for **elephant compatibility**.
+The upgrade to this package's [version v0.13.1](https://github.com/nemtech/nem2-sdk-typescript-javascript/releases/tag/v0.13.1) is mandatory for **elephant compatibility**.
 
 ### _Dragon_ Network Compatibility (catapult-server@0.4.0.1)