GH-283 Update junit-framework monorepo to v6 (major)

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

Author: renovate[bot]

buildSrc/src/main/kotlin/Versions.kt

@@ -2,9 +2,9 @@ object Versions {
 
     const val SPIGOT_API = "1.17.1-R0.1-SNAPSHOT"
 
-    const val JUNIT_JUPITER_API = "5.13.4"
-    const val JUNIT_JUPITER_PARAMS = "5.13.4"
-    const val JUNIT_JUPITER_ENGINE = "5.13.4"
+    const val JUNIT_JUPITER_API = "6.0.0"
+    const val JUNIT_JUPITER_PARAMS = "6.0.0"
+    const val JUNIT_JUPITER_ENGINE = "6.0.0"
 
     const val JETBRAINS_ANNOTATIONS = "26.0.2-1"