Bump org.junit:junit-bom from 5.12.1 to 5.13.1

Bumps [org.junit:junit-bom](https://github.com/junit-team/junit5) from 5.12.1 to 5.13.1.
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit-framework@r5.12.1...r5.13.1)

---
updated-dependencies:
- dependency-name: org.junit:junit-bom
  dependency-version: 5.13.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build.gradle

@@ -29,7 +29,7 @@ allprojects {
     ext {
         nanojsonVersion = "1d9e1aea9049fc9f85e68b43ba39fe7be1c1f751"
         jsr305Version = "3.0.2"
-        junitVersion = "5.12.1"
+        junitVersion = "5.13.1"
         checkstyleVersion = "10.4"
     }
 }