bump library version to 9.1.0 and update release-notes.md

Author: stephengold

HeartLibrary/release-notes.md

@@ -1,5 +1,14 @@
 # release log for the Heart Library and related tests
 
+## Version 9.1.0 released on TBD
+
++ Bugfix:  `NullPointerException` thrown in `MyControl.describe()`
++ Bugfix:  string userdata is doubly escaped in scene-graph dumps
++ Added the `CapsuleMesh` class to the library.
++ Added the `trianglesToLines(IndexBuffer, int)` method to the `MyMesh` class.
++ Added the `TrianglesToLines` app to the examples.
++ Updated Gradle to v8.8
+
 ## Version 9.0.0 released on 13 February 2024
 
 + Simplified the `VectorSet` interface. (API change)

HeartLibrary/src/main/java/jme3utilities/Heart.java

@@ -560,7 +560,7 @@ public static void setLoggingLevels(Level newLevel) {
      * @return project name, library name, branch, and revision
      */
     public static String version() {
-        return "Heart Heart master $Rev: 9.0.1-SNAPSHOT $";
+        return "Heart Heart master $Rev: 9.1.0 $";
     }
 
     /**

build.gradle

@@ -6,9 +6,9 @@ plugins {
 
 ext {
     jmeTarget = '' // distinguish non-JME libraries built for specific JME releases
-    heartSnapshot = '-SNAPSHOT' // for development builds
-    //heartSnapshot = '' // for release builds
-    heartVersion = '9.0.1' + jmeTarget + heartSnapshot
+    //heartSnapshot = '-SNAPSHOT' // for development builds
+    heartSnapshot = '' // for release builds
+    heartVersion = '9.1.0' + jmeTarget + heartSnapshot
 }
 
 subprojects {