Bump junit.jupiter.version from 5.6.2 to 5.9.1

Bumps `junit.jupiter.version` from 5.6.2 to 5.9.1.

Updates `junit-jupiter-api` from 5.6.2 to 5.9.1
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit-framework@r5.6.2...r5.9.1)

Updates `junit-jupiter-params` from 5.6.2 to 5.9.1
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit-framework@r5.6.2...r5.9.1)

Updates `junit-jupiter-engine` from 5.6.2 to 5.9.1
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit-framework@r5.6.2...r5.9.1)

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

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

Author: dependabot[bot]

pom.xml

@@ -11,7 +11,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>8</maven.compiler.source>
         <maven.compiler.target>8</maven.compiler.target>
-        <junit.jupiter.version>5.6.2</junit.jupiter.version>
+        <junit.jupiter.version>5.9.1</junit.jupiter.version>
     </properties>
 
     <dependencies>