Rewrite root gradle files using the Kotlin DSL

2 down, 1 to go.

Signed-off-by: Harsh Shandilya <harsh@prjkt.io>

build.gradle.kts

@@ -0,0 +1,52 @@
+import com.github.benmanes.gradle.versions.updates.DependencyUpdatesTask
+
+buildscript {
+    repositories {
+        google()
+        jcenter()
+        mavenCentral()
+        maven(url = "https://maven.fabric.io/public")
+    }
+    dependencies {
+        classpath("com.android.tools.build:gradle:3.2.1")
+        classpath("com.google.gms:google-services:4.2.0")
+        classpath("io.fabric.tools:gradle:1.26.1")
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+plugins {
+    id("com.github.ben-manes.versions") version "0.20.0"
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+        maven(url = "https://jitpack.io")
+    }
+}
+
+tasks.named<DependencyUpdatesTask>("dependencyUpdates") {
+    checkForGradleUpdate = true
+        resolutionStrategy {
+            componentSelection {
+                all {
+                    val rejected = listOf("alpha", "beta", "rc", "cr", "m", "preview")
+                      .map { qualifier -> Regex("(?i).*[.-]$qualifier[.\\d-]*") }
+                      .any { it.matches(candidate.version)
+                }
+                if (rejected) {
+                    reject("Release candidate")
+                }
+            }
+        }
+    }
+}
+
+tasks {
+    register("clean", Delete::class) {
+        delete(rootProject.buildDir)
+    }
+}

settings.gradle.kts

@@ -0,0 +1 @@
+include(":app")