Migrate to Kotlin DSL

build.gradle.kts

@@ -0,0 +1,34 @@
+plugins {
+    id("com.github.ben-manes.versions") version "0.28.0"
+}
+
+buildscript {
+    val kotlinVersion = "1.3.72"
+    extra.set("kotlinVersion", kotlinVersion)
+
+    repositories {
+        google()
+        jcenter()
+    }
+
+    dependencies {
+        classpath("com.android.tools.build:gradle:4.0.0-beta04")
+        classpath("com.github.ben-manes:gradle-versions-plugin:0.28.0")
+        classpath("com.google.firebase:firebase-crashlytics-gradle:2.0.0-beta04")
+        classpath("com.google.android.gms:oss-licenses-plugin:0.10.2")
+        classpath("com.google.gms:google-services:4.3.3")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion")
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+        maven("https://jitpack.io")
+    }
+}
+
+tasks.register("clean", Delete::class) {
+    delete(rootProject.buildDir)
+}