Update dependency org.junit.jupiter:junit-jupiter to v5.13.4 (#158)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 dkimcore = "1.5.4"
 dkim-gradle = "1.4.7"
 dokkatoo = "2.4.0"
-junit = "5.13.0"
+junit = "5.13.4"
 kotlin = "2.1.21"
 licenser = "0.6.1"
 mockito-kotlin = "5.4.0"