Bump junitVersion from 5.12.2 to 5.13.0 (#38)

Bumps `junitVersion` from 5.12.2 to 5.13.0.

Updates `org.junit.jupiter:junit-jupiter-api` from 5.12.2 to 5.13.0
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit-framework@r5.12.2...r5.13.0)

Updates `org.junit.jupiter:junit-jupiter-engine` from 5.12.2 to 5.13.0
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit-framework@r5.12.2...r5.13.0)

---
updated-dependencies:
- dependency-name: org.junit.jupiter:junit-jupiter-api
  dependency-version: 5.13.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.junit.jupiter:junit-jupiter-engine
  dependency-version: 5.13.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build.gradle

@@ -14,7 +14,7 @@ repositories {
 }
 
 ext {
-    junitVersion = '5.12.2'
+    junitVersion = '5.13.0'
 }
 
 sourceCompatibility = '21'