added junit dependencies

Author: hauner

build.gradle.kts

@@ -35,7 +35,11 @@ dependencies {
     implementation("com.fasterxml.jackson.core:jackson-databind:2.11.0")
     implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.11.0")
     implementation("com.google.jimfs:jimfs:1.1")
-    implementation("io.github.java-diff-utils:java-diff-utils:4.7")
+
+    implementation("org.junit.jupiter:junit-jupiter-api:5.6.2")
+    runtimeOnly("org.junit.jupiter:junit-jupiter-engine:5.6.2")
+    runtimeOnly("'org.junit.vintage:junit-vintage-engine:5.6.2")
+    compileOnly("junit:junit:4.13")
 }
 
 val sourcesJar by tasks.registering(Jar::class) {