Bump junit.version from 5.7.2 to 5.9.1

Bumps `junit.version` from 5.7.2 to 5.9.1.

Updates `junit-jupiter-engine` from 5.7.2 to 5.9.1
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit5@r5.7.2...r5.9.1)

Updates `junit-vintage-engine` from 5.7.2 to 5.9.1
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit5@r5.7.2...r5.9.1)

---
updated-dependencies:
- dependency-name: org.junit.jupiter:junit-jupiter-engine
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.junit.vintage:junit-vintage-engine
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -72,7 +72,7 @@
 
   <properties>
     <mavenVersion>3.2.5</mavenVersion>
-    <junit.version>5.7.2</junit.version>
+    <junit.version>5.9.1</junit.version>
     <project.build.outputTimestamp>2022-01-18T09:14:02Z</project.build.outputTimestamp>
   </properties>