Upgrade jQuery to 3.4.1

Author: ahornace

opengrok-indexer/src/main/java/org/opengrok/indexer/web/Scripts.java

@@ -100,7 +100,7 @@ public String toHtml() {
      * @see HttpServletRequest#getContextPath()
      */
     static {
-        SCRIPTS.put("jquery", new FileScript("js/jquery-3.2.0.min.js", 10));
+        SCRIPTS.put("jquery", new FileScript("js/jquery-3.4.1.min.js", 10));
         SCRIPTS.put("jquery-ui", new FileScript("js/jquery-ui-1.12.1-custom.min.js", 11));
         SCRIPTS.put("jquery-tablesorter", new FileScript("js/jquery-tablesorter-2.26.6.min.js", 12));
         SCRIPTS.put("tablesorter-parsers", new FileScript("js/tablesorter-parsers-0.0.1.js", 13));