Bump junit from 4.12 to 4.13.1

Bumps [junit](https://github.com/junit-team/junit4) from 4.12 to 4.13.1.
- [Release notes](https://github.com/junit-team/junit4/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/main/doc/ReleaseNotes4.12.md)
- [Commits](https://github.com/junit-team/junit4/compare/r4.12...r4.13.1)

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -16,7 +16,7 @@
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <codehaus.plexus-utils.version>3.0.20</codehaus.plexus-utils.version>
         <reflections.version>0.9.11</reflections.version>
-        <junit.version>4.12</junit.version>
+        <junit.version>4.13.1</junit.version>
         <mockito.version>2.22.0</mockito.version>
         <kotlin.version>1.3.21</kotlin.version>
         <java.source.version>1.8</java.source.version>