Bump junit from 4.12 to 4.13.1 in /examples

Author: dependabot[bot]

examples/pom.xml

@@ -67,7 +67,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.12</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
   </dependencies>