Convert TiLifecycleObserverTest to Kotlin

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = "1.2.51"
+    ext.kotlin_version = "1.3.11"
     repositories {
         google()
         jcenter()

thirtyinch/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: 'com.android.library'
+apply plugin: 'org.jetbrains.kotlin.android'
 apply plugin: 'guru.stefma.bintrayrelease'
 
 android {
@@ -42,6 +43,8 @@ dependencies {
     testImplementation "junit:junit:$junitVersion"
     testImplementation "org.mockito:mockito-core:$mockitoVersion"
     testImplementation "org.assertj:assertj-core:$assertjVersion"
+    testImplementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    testImplementation "io.mockk:mockk:1.8.13.kotlin13"
 
     androidTestImplementation "com.android.support.test:runner:$supportTestVersion"
     androidTestImplementation "org.mockito:mockito-core:$mockitoVersion"