Update jsTree to 3.3.15

hierarchy_manager.libraries.yml

@@ -22,43 +22,43 @@ feature.hm.jsoneditor:
 
 libraries.jquery.jstree:
   remote: https://github.com/vakata/jstree
-  version: '3.3.12'
+  version: '3.3.15'
   license:
     name: MIT
     url: https://github.com/vakata/jstree/blob/master/LICENSE-MIT
     gpl-compatible: true
   cdn:
-    https://cdnjs.cloudflare.com/ajax/libs/jstree/3.3.12/
+    https://cdnjs.cloudflare.com/ajax/libs/jstree/3.3.15/
   js:
-    /libraries/jquery.jstree/3.3.12/jstree.min.js: {minified: true}
+    /libraries/jquery.jstree/3.3.15/jstree.min.js: {minified: true}
   dependencies:
     - core/jquery
 
 libraries.jquery.jstree.default:
   remote: https://github.com/vakata/jstree
-  version: '3.3.12'
+  version: '3.3.15'
   license:
     name: MIT
     url: https://github.com/vakata/jstree/blob/master/LICENSE-MIT
     gpl-compatible: true
   cdn:
-    https://cdnjs.cloudflare.com/ajax/libs/jstree/3.3.12/themes/default/
+    https://cdnjs.cloudflare.com/ajax/libs/jstree/3.3.15/themes/default/
   css:
     component:
-      /libraries/jquery.jstree/3.3.12/themes/default/style.min.css: {}
+      /libraries/jquery.jstree/3.3.15/themes/default/style.min.css: {}
 
 libraries.jquery.jstree.default-dark:
   remote: https://github.com/vakata/jstree
-  version: '3.3.12'
+  version: '3.3.15'
   license:
     name: MIT
     url: https://github.com/vakata/jstree/blob/master/LICENSE-MIT
     gpl-compatible: true
   cdn:
-    https://cdnjs.cloudflare.com/ajax/libs/jstree/3.3.12/themes/default-dark/
+    https://cdnjs.cloudflare.com/ajax/libs/jstree/3.3.15/themes/default-dark/
   css:
     component:
-      /libraries/jquery.jstree/3.3.12/themes/default-dark/style.min.css: {}
+      /libraries/jquery.jstree/3.3.15/themes/default-dark/style.min.css: {}
 
 libraries.jsoneditor:
   remote: https://github.com/josdejong/jsoneditor