Bump junit from 4.12 to 4.13.1 (#136)

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](junit-team/junit4@r4.12...r4.13.1)

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

Author: dependabot[bot]

pom.xml

@@ -62,7 +62,7 @@
     <version.io.opentracing.contrib-opentracing-web-servlet-filter>0.4.0</version.io.opentracing.contrib-opentracing-web-servlet-filter>
     <version.io.opentracing.contrib-opentracing-tracerresolver>0.1.8</version.io.opentracing.contrib-opentracing-tracerresolver>
     <version.io.opentracing.contrib-opentracing-spring-tracer-configuration-starter>0.3.1</version.io.opentracing.contrib-opentracing-spring-tracer-configuration-starter>
-    <version.junit>4.12</version.junit>
+    <version.junit>4.13.1</version.junit>
     <version.org.mockito-mockito-core>2.23.4</version.org.mockito-mockito-core>
     <version.org.springframework.boot>2.3.4.RELEASE</version.org.springframework.boot>
     <!-- Should match version from https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot-dependencies/pom.xml  -->