Configure JUnit test

backend/mirai-console/build.gradle.kts

@@ -67,6 +67,15 @@ dependencies {
     testApi(kotlin("stdlib-jdk8"))
     testApi(kotlin("test"))
     testApi(kotlin("test-junit5"))
+
+    testImplementation("org.junit.jupiter:junit-jupiter-api:5.2.0")
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.2.0")
+}
+
+tasks {
+    "test"(Test::class) {
+        useJUnitPlatform()
+    }
 }
 
 // region PUBLISHING