Migrate from Groovy to Kotlin DSL

buildSrc/src/main/kotlin/Config.kt

@@ -0,0 +1,19 @@
+object Config {
+    object Plugin {
+        const val android = "com.android.tools.build:gradle:4.1.0"
+        const val kotlin =
+            "org.jetbrains.kotlin:kotlin-gradle-plugin:${Dependencies.Kotlin.version}"
+        const val google = "com.google.gms:google-services:4.3.4"
+        const val ktlint = "org.jlleitschuh.gradle:ktlint-gradle:9.4.0"
+        const val aboutLibraries =
+            "com.mikepenz.aboutlibraries.plugin:aboutlibraries-plugin:${Dependencies.AboutLibraries.version}"
+    }
+
+    object Android {
+        const val compileSdk = 30
+        const val buildToolsVersion = "30.0.2"
+
+        const val minSdk = 21
+        const val targetSdk = 30
+    }
+}