Updated pom.xml with new Nashorn dependency

Author: pborissow

pom.xml

@@ -33,7 +33,12 @@
       <dependency>
         <groupId>javaxt</groupId>
         <artifactId>javaxt-core</artifactId>
-        <version>1.12.1</version>
+        <version>1.12.3</version>
+      </dependency>
+      <dependency>
+        <groupId>org.openjdk.nashorn</groupId>
+        <artifactId>nashorn-core</artifactId>
+        <version>15.4</version>
       </dependency>
     </dependencies>