build.gradle

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

buildscript {
    ext.kotlin_version = '1.3.21'
    repositories {
        // You need to add the following repository to download the
        // new plugin.
        google()
        maven {
            url 'https://maven.fabric.io/public'
        }
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.2'
        classpath 'io.fabric.tools:gradle:1.28.1:'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.google.gms:google-services:4.2.0' // google-services plugin
        classpath "com.google.protobuf:protobuf-gradle-plugin:0.8.6"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        maven {
            url "https://maven.google.com" // Google's Maven repository
        }
        jcenter()
    }
}