Update pom.xml

pom.xml

@@ -36,6 +36,12 @@
 
     <build>
         <plugins>
+                  <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>license-maven-plugin</artifactId>
+        <version>1.12</version>
+      </plugin>
+
             <plugin>
                 <groupId>org.antlr</groupId>
                 <artifactId>antlr4-maven-plugin</artifactId>