Groovy updated for JDK 16 support

Signed-off-by: Maxim Nesen <[email protected]>

examples/groovy/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2010, 2020 Oracle and/or its affiliates. All rights reserved.
+    Copyright (c) 2010, 2021 Oracle and/or its affiliates. All rights reserved.
 
     This program and the accompanying materials are made available under the
     terms of the Eclipse Distribution License v. 1.0, which is available at
@@ -26,10 +26,10 @@
 
     <dependencies>
         <dependency>
-            <groupId>org.codehaus.groovy</groupId>
+            <groupId>org.apache.groovy</groupId>
             <artifactId>groovy-all</artifactId>
             <type>pom</type>
-            <version>3.0.2</version>
+            <version>4.0.0-alpha-2</version>
         </dependency>
         <dependency>
             <groupId>org.glassfish.jersey.test-framework.providers</groupId>
@@ -78,7 +78,7 @@
             <plugin>
                 <groupId>org.codehaus.gmavenplus</groupId>
                 <artifactId>gmavenplus-plugin</artifactId>
-                <version>1.6</version>
+                <version>1.12.1</version>
                 <executions>
                     <execution>
                         <id>1</id>