Bump org.codehaus.groovy:groovy-all from 2.4.4 to 2.4.21

Bumps [org.codehaus.groovy:groovy-all](https://github.com/apache/groovy) from 2.4.4 to 2.4.21.
- [Commits](https://github.com/apache/groovy/commits)

---
updated-dependencies:
- dependency-name: org.codehaus.groovy:groovy-all
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -234,7 +234,7 @@
 		<dependency>
 			<groupId>org.codehaus.groovy</groupId>
 			<artifactId>groovy-all</artifactId>
-			<version>2.4.4</version>
+			<version>2.4.21</version>
 			<scope>test</scope>
 		</dependency>