[docs] Update CHANGELOG for next release

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file. The format
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [UNRELEASED][unreleased]
+## [2.0.0][2.0.0]
+### Removed
+- Removed support for Elixir package
+### Changed
+- Builds are now powered by GitHub Actions, instead of Wercker
 
 ## [1.6.1][1.6.1]
 ### Added
@@ -210,7 +215,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 -   Removes some data formats (YAML/Large JSON) for cleaner code. If you were using them, please let create an issue.
 
-[unreleased]: https://github.com/razorpay/ifsc/compare/1.6.1...HEAD
+[unreleased]: https://github.com/razorpay/ifsc/compare/2.0.0...HEAD
+[2.0.0]: https://github.com/razorpay/ifsc/releases/tag/2.0.0
 [1.6.1]: https://github.com/razorpay/ifsc/releases/tag/1.6.1
 [1.5.13]: https://github.com/razorpay/ifsc/releases/tag/1.5.13
 [1.5.12]: https://github.com/razorpay/ifsc/releases/tag/1.5.12