Run test in parallel.

build.gradle.kts

@@ -151,6 +151,12 @@ allprojects {
     }
 }
 
+allprojects {
+    tasks.withType<Test> {
+        maxParallelForks = (Runtime.getRuntime().availableProcessors() / 2).coerceAtLeast(1)
+    }
+}
+
 allprojects {
     apply(plugin = "kover")
 }