Upgrade Groovy to 4.0.2

Author: mattirn

pom.xml

@@ -92,7 +92,7 @@
         <gogo.jline.version>1.1.8</gogo.jline.version>
         <slf4j.version>1.7.21</slf4j.version>
         <findbugs.version>3.0.2</findbugs.version>
-        <groovy.version>4.0.1</groovy.version>
+        <groovy.version>4.0.2</groovy.version>
         <ivy.version>2.5.0</ivy.version>
         <graal.version>19.3.1</graal.version>