build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext.kotlin_version = '1.2.50'
    repositories {
        jcenter()
        mavenCentral()
        google()
    }
    dependencies {
        // Android plugin for gradle
        // http://google.github.io/android-gradle-dsl
        classpath 'com.android.tools.build:gradle:3.1.4'

        // Get latest version from
        // https://bintray.com/android/android-tools/com.google.gms.google-services/view
        classpath 'com.google.gms:google-services:3.0.0'

        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
        maven { url "https://jitpack.io" }
        maven { url "https://maven.google.com" }
    }
}