Bump junit from 4.11 to 4.13.1 in /test-projects (SpoonLabs#206)

Bumps [junit](https://github.com/junit-team/junit4) from 4.11 to 4.13.1.
- [Release notes](https://github.com/junit-team/junit4/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/main/doc/ReleaseNotes4.11.md)
- [Commits](junit-team/junit4@r4.11...r4.13.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

test-projects/pom.xml

@@ -15,7 +15,7 @@
   	<dependency>
   		<groupId>junit</groupId>
   		<artifactId>junit</artifactId>
-  		<version>4.11</version>
+  		<version>4.13.1</version>
   	</dependency>
   </dependencies>
 </project>