[docs] Update CHANGELOG

CHANGELOG.md

@@ -1,24 +1,52 @@
+## Version 2.2.0
+
+* **Features**
+  + Add support for Admob medation.
+  + Add the ability to listen for ad impressions.
+  + Add support for Smatto, Yandex and MyTarget ad networks.
+* **Breaking Changes**
+  + Hera no longer supports MoPub medation. 
+
+## Version 2.1.0
+
+* **Features**
+  + Add support for IronSource Mediation.
+  + Add support for custom native ads.
+  + Add support for rewarded video ads.
+
+## Version 2.1.0
+
+* **Features**
+  + Add support for IronSource Mediation.
+  + Add support for custom native ads.
+  + Add support for rewarded video ads.
+  + Add support for Inmobi, Criteo and Pubnative ad networks.
+
 
 ## Version 2.0.0
-- **Features**
-  - Add support for banner ads type
-  - Add support for Tiktok ad network.
+
+* **Features**
+  + Add support for banner ads type
+  + Add support for Tiktok ad network.
     - 
+
 ## Version 1.2.0
-- **Features**
-  - Add support for more 5 ads networks including:
+
+* **Features**
+  + Add support for more 5 ads networks including:
     - Applovin
     - Chartboost
     - Vungle
     - IronSource
     - UnityAds
 
-- **Bug Fixes**
-  - Prevent the user from sending too many request when another load operation is in progress.
+* **Bug Fixes**
+  + Prevent the user from sending too many request when another load operation is in progress.
 
 ## Version 1.1.0
-- **Features**
-  - Add the ability to ignore after-ad timer and open ads directly.
 
-- **Bug Fixes**
-  - Prevent crashing when using wrong provider ID.
+* **Features**
+  + Add the ability to ignore after-ad timer and open ads directly.
+
+* **Bug Fixes**
+  + Prevent crashing when using wrong provider ID.