Update for 2.3.0

Author: brunomnsilva

README.md

@@ -27,6 +27,10 @@ through a [force-directed algorithm](https://en.wikipedia.org/wiki/Force-directe
 
 ### What's new?
 
+- (2.3.0) Notable changes:
+
+  - 👍 Edges only span the distance between vertex boundaries (instead of centers). This yields a nicer visualization when vertices are made transparent.
+
 - (2.2.0) Notable changes:
 
     - ⚠️ Bump minimum JDK to 11 and define library as a Java Module;