Bump junit dependency in integration tests pom

Author: msimacek

graalpython/com.oracle.graal.python.test.integration/pom.xml

@@ -181,7 +181,7 @@ Additionally, one can change the polyglot artifacts version with
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.2</version>
         </dependency>
     </dependencies>
 </project>