Add info to CHANGELOG

Update submodules

.gitmodules

@@ -5,14 +5,16 @@
 	update = merge
 [submodule "lib/catch2"]
 	path = lib/catch2
-        main  = v2.x
+    main  = v2.x
 	update = merge
 	url = https://github.com/catchorg/Catch2.git
 [submodule "lib/json"]
 	path = lib/json
 	url = https://github.com/nlohmann/json.git
-        master = master
+    master = master
 	update = merge
 [submodule "lib/folding"]
 	path = lib/folding
 	url = https://github.com/rmontanana/folding
+	main = main
+	update = merge

CHANGELOG.md

@@ -5,10 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## =[Unreleased]
+## [Unreleased]
 
 ### Added
 
+- Voting / probability aggregation in Ensemble classes
 - predict_proba method in Classifier
 - predict_proba method in BoostAODE
 - predict_voting parameter in BoostAODE constructor to use voting or probability to predict (default is voting)