update changelog

Author: alphaville

CHANGELOG.md

@@ -8,6 +8,17 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 Note: This is the main Changelog file for the Rust solver. The Changelog file for the Python interface (`opengen`) can be found in [/open-codegen/CHANGELOG.md](open-codegen/CHANGELOG.md)
 
 
+<!-- ---------------------
+      v0.11.1
+     --------------------- -->
+## [v0.11.2] - Unreleased
+
+
+### Fixed
+
+- Rust solver supports generic float types
+
+
 <!-- ---------------------
       v0.11.1
      --------------------- -->