Prepare changelog for v0.2.0.0

Author: Mikolaj

CHANGELOG.md

@@ -3,3 +3,9 @@
 ## [v0.1.0.0](https://github.com/Mikolaj/horde-ad/compare/v0.0.0.0...v0.1.0.0)
 
 - First version. Released on an unsuspecting world.
+
+## [v0.2.0.0](https://github.com/Mikolaj/horde-ad/compare/v0.1.0.0...v0.2.0.0)
+
+- Modernize the dep (ilist) that provides imap to make Stackage happy
+- Make the cabal sublibraries public, as intended
+- Tweak benchmarks