Update changelog for latest changes.

Author: brunomnsilva

CHANGELOG.md

@@ -3,10 +3,12 @@
 - (2.2.0) Notable changes:
 
     - ⚠️ Bump minimum JDK to 11 and define library as a Java Module;
-    - Robust algorithm for vertex spawning;
+    - 👍 Robust algorithm for vertex spawning;
     - Propagation of hover events to labels and arrows (can be styled);
+    - 🎉 Improve edge readability (issue #43) by changing the label underlying representation to a StackPane. Labels now accept CSS styles for Pane (background) and Text (the label itself).
+    - ⚠️ Fixed a regression that affected the movement of vertices.
     - ...
-
+  
 - (2.1.0) Notable changes:
 
     - Improved edge and label rendering;