nifty library: bump version to 0.9.21 and update release-notes.md

Author: stephengold

common.gradle

@@ -31,7 +31,7 @@ gradle.projectsEvaluated {
 ext {
     // current versions of various libraries
     heartVersion = '6.4.4'
-    jme3utilitiesniftyVersion = '0.9.21-SNAPSHOT'
+    jme3utilitiesniftyVersion = '0.9.21'
     jme3utilitiesuiVersion = '0.9.4'
     jme3utilitiesxVersion = '0.2.22-SNAPSHOT'
     jmonkeyengineVersion = '3.4.0-stable'

nifty/build.gradle

@@ -23,8 +23,8 @@ dependencies {
     api 'com.github.nifty-gui:nifty:1.4.3'
     api 'com.github.nifty-gui:nifty-default-controls:1.4.3'
 
-    //api 'com.github.stephengold:jme3-utilities-ui:' + jme3utilitiesuiVersion
-    api project(':ui')
+    api 'com.github.stephengold:jme3-utilities-ui:' + jme3utilitiesuiVersion
+//    api project(':ui')
 }
 
 // publishing tasks

nifty/release-notes.md

@@ -1,5 +1,9 @@
 # release log for the jme3-utilities-nifty library and related tests
 
+## Version 0.9.21 released on TBD
+
+Add the "dialog", "submenu", and "tool" icon textures, from Maud.
+
 ## Version 0.9.20 released on 31 May 2021
 
 Base on version 6.4.4 of the Heart Library and version 0.9.4 of

nifty/src/main/java/jme3utilities/nifty/LibraryVersion.java

@@ -60,6 +60,6 @@ private LibraryVersion() {
      * @return branch and revision (not null, not empty)
      */
     public static String versionShort() {
-        return "master 0.9.21-SNAPSHOT";
+        return "master 0.9.21";
     }
 }