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

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

Author: dependabot[bot]

pom.xml

@@ -39,7 +39,7 @@
         <httpcomponents.version>4.5.2</httpcomponents.version>
         <guava.version>19.0</guava.version>
         <jackson.version>2.9.9</jackson.version>
-        <junit.version>4.12</junit.version>
+        <junit.version>4.13.1</junit.version>
         <mockito.version>1.10.19</mockito.version>
     </properties>