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]

build.gradle

@@ -150,7 +150,7 @@ subprojects {
     dependencies {
         implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
 
-        testImplementation group: 'junit', name: 'junit', version: '4.12'
+        testImplementation group: 'junit', name: 'junit', version: '4.13.1'
         testImplementation "org.mockito:mockito-core:3.6.28"
         testImplementation "com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0"
         testImplementation "org.assertj:assertj-core:3.18.1"